Problem 4) Compute the following operations using the 8-bit 2's complement encoded numbers. For each sum, indicate if overflow has occurred. a) 01010011 10111101 + 11110101 - 00111101 b) Convert 38 (decimal) to 8-bit 2's complement representation. c) Convert -42 (decimal) to 8-bit 2's complement representation d) Compute 42-38 using 8-bit 2's complement representation. e) Compute 38-42 using 8-bit 2's complement representation