Write a function named ship_cost that takes a float package weight and returns an int shipping cost in dollars. Return None if the package cannot be shipped. Write a main program that gets the package weight from the user and calls the function to compute the shipping cost. main then prints to the user either the shipping cost or a message the package cannot be shipped

I need help writing code in Python. Both questions are the same. So there will be one combine code. And PLEASE USE EXPLICIT RETURN NONE.

The cost of sending a package by an express delivery service is $15.00 for the first two pounds, and $5.00 for each pound or fraction thereof over two pounds. If the package weighs more than 70 pounds, a $15.00 excess weight surcharge is added to the cost. No package over 100 pounds will be accepted. Write a pro- gram that accepts the weight of a package in pounds and computes the cost of mailing the package. Be sure to handle the case of overweight packages