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