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1. Write a program that prompts the user for the percentage earned on a test and then displays the corresponding letter grade. Use the following grading scale 90-100 A 80-89 B 70-79 C 60-69 D Below 60 F The program should like similar to Enter the percentage: 80 The corresponding letter grade is: B 2. A wholesale egg company bases their prices on the number of eggs purchased: 0 up to but not including 4 dozen s0.50 per dozen 4 up to but not including 6 dozen $0.45 per dozen 6 up to but not including 11 dozen $0.40 per dozen 11 or more dozen Extra eggs are priced at 1/12 per dozen price. Write a program that prompts the user for the number of eggs, and then calculates the bill. The program should look similar to: Enter the number of eggs purchased: 18 The bill is equal to: $0.75 $0.35 per dozen