Question $4$:

a$)$ Write a Python program to display the first and last colors from the following list. color$\_$list $=["$Red$",$ "Green", "White", "Black"$]$

b$.$ Write a function to test if two numbers are amicable. Amicable numbers are twc different numbers so related that the sum of the divisor of each is equal to the other number. Suppose we have two numbers, $123$ and $426,$ we need to find all the divisor: and $426.$ The sum of the divisor of $123$ should equal $426,$ and the divisor of $426$ shou $123.$