In basic java please

A mobile phone service provider has three different subscription packages for its customers: Package A: For $39.99 per month 450 minutes are provided. Additional minutes are $0.45 per minute. Package B: For $59.99 per month 900 minutes are provided. Additional minutes are $0.40 per minute. Package C: For $69.99 per month unlimited minutes provided. Write a program that calculates a customer's monthly bill. It should ask which package the customer has purchased and how many minutes were used. It should then display the total amount due. Input Validation: Be sure the user only selects package A,B, or C