Assignment 1
Find out the commands starting with "ab"?
List out the commands starting with "a"?

Assignment 2
Look-up the documentation of round and see how to use it. 

Assignment 3
Type round(2.484, and press Enter and then cancel the command using Ctrl-C. 
Type the command- round(2.484, 2)

Assignment 4
Type round(2.484, and press enter. and then cancel the command using Ctrl-C.
Type the command, round(2.484, 2)