The following are statements about aspects of binary arithmetic operations:a. subtraction is addition with the sign of the subtrahend changedb. the sign of a positive or negative number is remains the same by taking its 2’s complement.c. to subtract two signed numbers, take the 2’s complement of the subtrahend and add. Discard any final carry.Which of the above is/are true?Group of answer choicesall except ba and b onlyall the abovec only

The  reason why digital computers use complemented subtraction is that it*(A) Simplifies the circuitry.(B) Is a very simple process.(C) Can handle negative numbers easily.(D) Avoids direct subtraction.

According to the order of operations, which of the following is true?Addition is done before subtraction.Addition and subtraction are done at the same time, from right to left.Addition and subtraction are done at the same time, from left to right.Subtraction is done before addition.

In binary system each and every number and its sign are represented by using only thesetwo digits 0 and 1. As the negative and positive signs cannot be written directly in binarysystem. The alternative method to represent negative and positive numbers is the 2’scomplement method. It has an interesting property that the binary arithmetic operationcan be performed easily on signed or unsigned numbers. Compute the following binaryarithmetic operations using 2’s complement method. Show all the steps clearly. (LO 01)(2*5 = 10 Marks)a) Sum of -30 and 17b) Sum of -42 and -15c) Sum of -13 and -16d) Multiplication of -8 by 6e) Multiplication of -11 by -9

2’S Complement Subtraction As in 1’S complement subtraction, the 2’S complement subtraction method allows subtracting numbers simply by using addition operation only.

3) Let R1 and R2 be two 4-bit registers that store numbers in 2's complement form. For the operation R1 + R2, which one of the following values of R1 and R2 gives an arithmetic overflow?