write both program in python

3.4 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. 3.5 In Example 3.3, we wrote a program to evaluate the function f(x, y) for any two user-specified values x and y, where the function f(x, y) was defined as follows: x + y x 20 and y = 0 x + 12 x 20 and y