1. Add the following 16-bit binary signed numbers. If a result cannot be represented in 16 bits, then write "overflow". Negative numbers are represented using two's complement. (24 points a. 0001 0101 0111 11012 +0111 1111 1011 1111 2 b. 1111 0101 0111 1101 2 +0101 0011 1010 1110 2 c. 1111 0101 0111 1101 2 +1111 1011 1110 1010 2