consider a machine that performs calculations 4 bits a time.Eight-bit 2's complement numbers can be added by adding the four least significant bits,followed by the four most significant bits.The leftmost bit is used for the sign ,as usual.With 8 bits for each number, add -4 and -6, using 4bits binart

2's complement arithmetic.

Did over-flow occur??Did carry occur??Verify your numerical result??