programming language is C++. Please read instructions in both pictures, as it has to be done a specific way. thank you!

Questions to be worked on are : Programming Challenge 25. Mobile Service Provider(Page 228) For this program, make sure you include the following modifications - Make sure customer name and billing month is accepted. Billing month should be in the range 1-12. If it is not, please display an error message - Make sure a user enters only 'A', 'B' or 'C' for the plan package code Display an error message if any other letter is entered. - Only if a valid package code('A'Y'B', or 'C') is entered, then the user should be asked to enter the number of gigabytes used - Display a bill with month of bill, customer name, package code, charges included in package deal, and charge for additional data, Make sure you use identifying labels too. For Programming Challenge 25, you will need to send me the cpp file only. While saving your C++ application, name the application file and cpp file using the format your listame. Chat 25 25. Mobile Service Provider A mobile phone service provider has three different data plans for its customers: Package A: For $39,99 per month, 4 gigabytes are provided. Additional data costs $10 per gigabyte. Package B: For $59.99 per month, 8 gigabytes are provided. Additional data costs $5 per gigabyte. Package C: For $69.99 per month, unlimited data is provided. Write a program that calculates a customer's monthly bill. It should ask which package the customer has purchased and how many gigabytes were used. It should then display the total amount due. Input Validation: Be sure the user only selects package A, B, or C