please show al work for wuestions

Consider 8-bit 2's complement representation. (a) Given two binary numbers: A = 01001001 and B = 010110, first find the result of (A + B), second convert the result to decimal, third check whether overflow happens. (b) Given two binary numbers: A = 10001001 and B = 011001, first find the result of (A - B), second convert the result to decimal, third check whether overflow happens. (c) Given two hexadecimal numbers: A = x83 and B = xA7, first find the result of (A + B), second convert the result to decimal, third check whether overflow happens