Write a program that grades the written portion of the driver's license exam. The exam has 20 multiple choice questions (answers input into code already. Your program should store the student's answers for each of 20 questions in an array, the answers in another array. After the student's answers have been entered, the program should display a message indicating whether the student passed or failed the exam (a student must correctly answer 15 of the 20 questions to pass). It should display the total number of correctly answered questions, the total number of incorrectly answered questions, and a list showing the question numbers of the incorrectly answered questions. Input validation: only accept A, B, C or D as answers.

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You need to design a circuit that implements the functions in the following table: s0 s1 function0 0 a + 10 1 a – b1 0 a + b1 1 a – 1s0 and s1 are 1-bit control inputs to select the function of the circuit. inputs a and b are 4-bitnumbers in 2s complement form. the output is also a 4-bit number in 2s complement form.you are allowed to use only one ttl 7483 4-bit adder to implement all the functions. but anynumber of other components (except the adder) can be used.hint: design a combinational logic circuit to modify the input b and the “carry input” of theadder depending on the control inputs s0 and s1.important: lab grade will depend on the working of the circuit & will be checked of by your labinstructor.1. is the output valid for the following input combinations: a. s0 = 0, s1 = 0, a = 7, b = 3? b. s0 = 0, s1 = 1, a = 7, b = 3? c. s0 = 1, s1 = 0, a = -4, b = -5? d. s0 = 1, s1 = 1, a = -8, b = 6? 2. what is the range of inputs (for both a and b) that will produce the valid output for all the functions?

(328 inc. 448 ind. 480 in25. john has a collection of toy cars. he has 2 red cars, 4 blue cars, 4 black cars, and 6 yellowcars. what is the ratio of red cars to yellow cars? a. 1: 2b. 1: 3c. 1: 626. the net of a right triangular prism is shown below.