can i get the solution for question 4 and 5

4. format number (num) It takes a non-negative number as a parameter and returns a string representing the same number with commas inserted properly as thousand separator. You are not allowed to use any formatting. library/function provided in python. 5. simplify (directione) You are given directions to drive from a source to a destination. The directions are a combination of "Dast", "West", "South", and "North". Obviously, driving to one direction and driving back in the opposite direction is a waste of time. So you want to eliminate the useless steps so that you have only the necessary directions to the destination. Write a function sinplify that takes a list of directions and returns the simplified version of it. \> simplify (["NORTH", "EAST"]) ['NORTH', 'EAST'] \> simplify (["NORTH", "EAST", "SOUTH", "SOUTH", "WEST"]) [SOUTH'] >> simplify (["NORTH", "SOUTH", "SOUTH", "EAST", "WEST", "NORTH", "WEST"]) ['WEST'] simplify (["NORTH", "SOUTH", "SOUTH", "EAST", "NORTH", "WEST", "NORTH", "WEST"]) ['NORTH', 'HEST'] > simplify (["NORTH", "EAST", "SOUTH", "KEST"])