a) An Internet Service Provider has three different subscription offers for its customers: - Offer A: For $9.95 per month 10 hours of access are provided. Additional hours are $2.00 per hour - Offer B: For $13.95 per month 20 hours of access are provided. Additional hours are $1.00 per hour Write a method with the header below that accepts the offer type and the number of hours and returns the total charges:

public static double charge(char offer, int hours)

b) Write a program that reads the offer the customer has purchased (A or B) and the number of hours that were used, and then displays the total charges. If the offer is different than A and B, or the number of hours is negative, then the message wrong entry is displayed.