1. Determine the decimal value of the following 8-bit 2's complement numbers.
(a) 11111011
(b) 00110111
(c) 11100011
2. Perform the following addition or subtraction of the given numbers using 8-bit 2's complement representation of the numbers. Parts (a) and (b) are given in decimal, while parts (c)-(e) are given in 8-bit 2's complement. Indicate in each case whether overflow occurs.
(a) (-65)+(+72)
(b) (-65)-(+72)
(c) 01101100-01010011
(d) 01101100+01010011
(e) 11100011+11111001