Write definitions for two functions:

$$ sum$\_$n$($n$)$ returns the sum of the first n positive integers.

$$ sum$\_$cubes$($n$)$ returns the sum of the cubes of the first n positive integers.

Write main$()$ that prompts the user for a positive integer n$,$ calls the above functions and prints out

the sum of the first n integers and the sum of the cubes of the first n integers.