3) Add 0x8000 (-32768) and 0xffff (-1). Represent the computed result using 16 bits. What is the sign of the computed result? What is the sign of the true result? Why is there a discrepancy between the computed result and the true result?

4) What is the range of 20-bit twos complement signed numbers, sign-magnitude signed numbers, and unsigned numbers?

5) What is the range of 5-bit twos complement numbers? 9-bit? 11-bit?