I am a very new Ubuntu and Linux user and I encounter the following warnings when updating with sudo apt-get update:

Hit:1 http://dl.google.com/linux/chrome/deb stable InRelease

Hit:2 http://ppa.launchpad.net/cappelikan/ppa/ubuntu hirsute InRelease                           

Hit:3 http://ppa.launchpad.net/linuxuprising/ppa/ubuntu hirsute InRelease                        

Hit:4 http://archive.ubuntu.com/ubuntu hirsute InRelease                   

Hit:5 http://archive.canonical.com/ubuntu hirsute InRelease

Get:6 http://archive.ubuntu.com/ubuntu hirsute-updates InRelease [109 kB]

Hit:7 http://archive.ubuntu.com/ubuntu hirsute-backports InRelease

Hit:8 http://archive.ubuntu.com/ubuntu hirsute-security InRelease

Fetched 109 kB in 1s (142 kB/s)

Reading package lists... Done

Building dependency tree... Done

Reading state information... Done

All packages are up to date.

W: Skipping acquire of configured file 'multiverse/binary-amd64/Packages' as repository 'http://archive.canonical.com/ubuntu hirsute InRelease' doesn't have the component 'multiverse' (component misspelt in sources.list?)

W: Skipping acquire of configured file 'multiverse/binary-i386/Packages' as repository 'http://archive.canonical.com/ubuntu hirsute InRelease' doesn't have the component 'multiverse' (component misspelt in sources.list?)

W: Skipping acquire of configured file 'multiverse/i18n/Translation-en' as repository 'http://archive.canonical.com/ubuntu hirsute InRelease' doesn't have the component 'multiverse' (component misspelt in sources.list?)

W: Skipping acquire of configured file 'multiverse/i18n/Translation-en_US' as repository 'http://archive.canonical.com/ubuntu hirsute InRelease' doesn't have the component 'multiverse' (component misspelt in sources.list?)

W: Skipping acquire of configured file 'multiverse/dep11/Components-amd64.yml' as repository 'http://archive.canonical.com/ubuntu hirsute InRelease' doesn't have the component 'multiverse' (component misspelt in sources.list?)

W: Skipping acquire of configured file 'multiverse/dep11/icons-48x48.tar' as repository 'http://archive.canonical.com/ubuntu hirsute InRelease' doesn't have the component 'multiverse' (component misspelt in sources.list?)

W: Skipping acquire of configured file 'multiverse/dep11/icons-64x64.tar' as repository 'http://archive.canonical.com/ubuntu hirsute InRelease' doesn't have the component 'multiverse' (component misspelt in sources.list?)

W: Skipping acquire of configured file 'multiverse/dep11/[email protected]' as repository 'http://archive.canonical.com/ubuntu hirsute InRelease' doesn't have the component 'multiverse' (component misspelt in sources.list?)

W: Skipping acquire of configured file 'multiverse/cnf/Commands-amd64' as repository 'http://archive.canonical.com/ubuntu hirsute InRelease' doesn't have the component 'multiverse' (component misspelt in sources.list?)

I know I should edit the sources.list, but I can not tell for sure which line, this is the output of cat /etc/apt/sources.list:

# deb cdrom:[Ubuntu 21.04 _Hirsute Hippo_ - Release amd64 (20210420)]/ hirsute main restricted



# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to

# newer versions of the distribution.

deb http://archive.ubuntu.com/ubuntu hirsute main restricted

# deb-src http://ro.archive.ubuntu.com/ubuntu/ hirsute main restricted



## Major bug fix updates produced after the final release of the

## distribution.

deb http://archive.ubuntu.com/ubuntu hirsute-updates main restricted

# deb-src http://ro.archive.ubuntu.com/ubuntu/ hirsute-updates main restricted



## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu

## team. Also, please note that software in universe WILL NOT receive any

## review or updates from the Ubuntu security team.

deb http://archive.ubuntu.com/ubuntu hirsute universe

# deb-src http://ro.archive.ubuntu.com/ubuntu/ hirsute universe

deb http://archive.ubuntu.com/ubuntu hirsute-updates universe

# deb-src http://ro.archive.ubuntu.com/ubuntu/ hirsute-updates universe



## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu 

## team, and may not be under a free licence. Please satisfy yourself as to 

## your rights to use the software. Also, please note that software in 

## multiverse WILL NOT receive any review or updates from the Ubuntu

## security team.

deb http://archive.ubuntu.com/ubuntu hirsute multiverse

# deb-src http://ro.archive.ubuntu.com/ubuntu/ hirsute multiverse

deb http://archive.ubuntu.com/ubuntu hirsute-updates multiverse

# deb-src http://ro.archive.ubuntu.com/ubuntu/ hirsute-updates multiverse



## N.B. software from this repository may not have been tested as

## extensively as that contained in the main release, although it includes

## newer versions of some applications which may provide useful features.

## Also, please note that software in backports WILL NOT receive any review

## or updates from the Ubuntu security team.

deb http://archive.ubuntu.com/ubuntu hirsute-backports main restricted universe multiverse

# deb-src http://ro.archive.ubuntu.com/ubuntu/ hirsute-backports main restricted universe multiverse



## Uncomment the following two lines to add software from Canonical's

## 'partner' repository.

## This software is not part of Ubuntu, but is offered by Canonical and the

## respective vendors as a service to Ubuntu users.

deb http://archive.canonical.com/ubuntu hirsute partner multiverse

# deb-src http://archive.canonical.com/ubuntu hirsute partner



deb http://archive.ubuntu.com/ubuntu hirsute-security main restricted

# deb-src http://security.ubuntu.com/ubuntu hirsute-security main restricted

deb http://archive.ubuntu.com/ubuntu hirsute-security universe

# deb-src http://security.ubuntu.com/ubuntu hirsute-security universe

deb http://archive.ubuntu.com/ubuntu hirsute-security multiverse

# deb-src http://security.ubuntu.com/ubuntu hirsute-security multiverse



# This system was installed using small removable media

# (e.g. netinst, live or single CD). The matching "deb cdrom"

# entries were disabled at the end of the installation process.

# For information about how to configure apt package sources,

# see the sources.list(5) manual.

This is the output of lsb_release -a:

No LSB modules are available.

Distributor ID: Ubuntu

Description:    Ubuntu 21.04

Release:    21.04

Codename:   hirsute