An Internet Service Provider(ISP) has three different subscription packages for its customers: Package A: For $15 per month with 50 hours of access provided. Additional hours are $2.00 per hour over 50 hours. Assume usage is recorded in one-hour increments,
Package B: For $20 per month with 100 hours of access provided. Additional hours are $1.50 per hour over 100 hours.
Package C: For $25 per month with 150 hours access is provided. Additional hours are $1.00 per hour over 150 hours Assume the Billing Cycle is 30 days. The ISP has contracted us to write the application soft are for their new Billing System.

Requried:
a. Write the Functions to do the tasks that we will be used to develop the application.
b. Write an Interactive Console Application using only the Functions which you developed in Part 1.