3. Many years ago, a mobile phone service provider had different subscription packages for its customers...

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3. Many years ago, a mobile phone service provider had different subscription packages for its customers as follows: Package Detail A $39.99 per month with 450 minutes included, $0.45 per minute for additional minutes B C $59.99 per month with 900 minutes included, $0.40 per minute for additional minutes $69.99 per month with unlimited minutes Write a program with the following specifications: 1) The program should ask user to enter the letter of the package user had purchased (A, B, or C) and the number of minutes used for the month and display the total charge. 2) The program should also calculate and display the amount that would be saved had Package A customers purchased Package B or Package C; or the amount that would be saved had Package B customers purchased Package C. 3. Many years ago, a mobile phone service provider had different subscription packages for its customers as follows: Package Detail A $39.99 per month with 450 minutes included, $0.45 per minute for additional minutes B C $59.99 per month with 900 minutes included, $0.40 per minute for additional minutes $69.99 per month with unlimited minutes Write a program with the following specifications: 1) The program should ask user to enter the letter of the package user had purchased (A, B, or C) and the number of minutes used for the month and display the total charge. 2) The program should also calculate and display the amount that would be saved had Package A customers purchased Package B or Package C; or the amount that would be saved had Package B customers purchased Package C.