Unable to install ROS TurtleBOT - Unable to locate package

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My OS : Distributor ID: Ubuntu Description: Ubuntu 20.04.1 LTS Release: 20.04 Codename: focal

My ROS

/rosdistro: noetic
/rosversion: 1.15.8

When I try to intall turtlebot packages using this

$ sudo apt-get install ros-indigo-turtlebot ros-indigo-turtlebot-apps ros-indigo-turtlebot-interactions ros-indigo-turtlebot-simulator ros-indigo-kobuki-ftdi ros-indigo-rocon-remocon ros-indigo-rocon-qt-library ros-indigo-ar-track-alvar-msgs

I get this Error :

Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package ros-indigo-turtlebot
E: Unable to locate package ros-indigo-turtlebot-apps
E: Unable to locate package ros-indigo-turtlebot-interactions
E: Unable to locate package ros-indigo-turtlebot-simulator
E: Unable to locate package ros-indigo-kobuki-ftdi
E: Unable to locate package ros-indigo-rocon-remocon
E: Unable to locate package ros-indigo-rocon-qt-library
E: Unable to locate package ros-indigo-ar-track-alvar-msgs

Even if I change the distro to kinetic or noetic , that still produces the same error messages with given distro name.

Why is this happening? Kindly help ASAP.