2. Convert the following unsigned 16-bit positive binary numbers into negative two's complement numbers. If the result cannot be represented in 16 bits, then write "overflow". (24 points) a. 0111 1101 1111 1101 2 b. 1000 0000 0000 0000 2 1111 1111 1111 11112 C. 3. Extend the following 8-bit binary signed numbers as 16-bit binary signed (8 points) a. 0010 11102 b. 1101 1101 2