3. (20) Perform these hexadecimal additions using 16-bit arithmetic. State your answer as a 4-digit hexadecimal number. Below each total write "C" or "NC" to indicate whether there is or is not a carry error, and "O" of "NO" to indicate whether there is or is not an overflow error. CCCC 9999 7777 3333 BBBB BBBB 8888 4444