3 Given two decimal numbers: A=-12 and B=-7. a) [1 Mark] Convert these numbers to 5-bit 2's-complement numbers. b) Perform the following operations (in binary): b.) [1 Mark] A+B b.ii)[1 Mark] A-B b.) [1 Mark] A*B c) (1 Mark] State whether or not overflow occurs in cases b.i and b.ii