In a Caesar Cipher system, if encryption is done by the rule c = E(p + k) = p +9, then the letter 'q' is encrypted as what other letter? Given the 8-bit two's complement numbers A = 0110 1000, and B = 0101 1010, compute -B in two's complement, and then compute A-B by adding A and -B in two's complement. Answer all the following: Determine -B = Compute: A - B = IS there an overflow, and why? ____ What is the value of the answer in decimal?____