C++ program The local Driver's License Office has asked you to write a program that grades the written portion of the driver's license exam. The exam has 20multiple choice questions.Here are the correct answers 1.B 2.D 3.A 4.A 5.C 6.A 7.B 8.A 9.C. 10.D 11.B 12.C 13.D 14.A 15.D 16.C 17.C 18.B 19.D 20.A Your programshould store the correct answers shown above in array. It should ask the user to enter the student's answers for each of the 20 questions, and the answers shouldbe stored in another array. After the student's answers have entered, the program should display a message indicating whether the student passed or failed theexam. (A student must correctly answer 15 of the 20 question to pass the exam.) It should then display the total number of correctly answered questions, the totalnumber of incorrectly answered questions, and a list showing the question numbers of the incorrectly answered questions. Input Validation: Only accept the lettersA,B,C or D as answer