An internet Service provider Part 1 An Internet service provider has three different subscription packages for its customers 

Package A For $9.95 per month 10 hours of access are provided Additional hours are $2.00 per hour 

Package B For $13.95 per month 20 hours of access are provided Additional hours are $1.00 per hour 

Package C For $19.95 per month unlimited access is provided 

Write a program that calculates a customers monthly bill It should ask the user to enter the letter of the package the customer has purchased, and how many hours were used. It should then create a bill that includes the input information and the total amount due. 

The bill should be written to a file. Input Validation: Be sure the user only selects package A, B, or C. Also, the number of hours used in a month cannot exceed 744. [20 points]