17. 17.

a) In a computer instruction format, the instruction length is 11 bits and the size of an address field is 4 bits. Is it possible to have 1. 5 two-address instructions 2. 45 one-address instructions 3. 32 zero-address instructions 4. using the specified format? Justify your answer.

1.

b) Assume that a computer architect has already designed 6 two-address and 24 zero-address instructions using the instruction format above. What is the maximum number of one-address instructions that can be added to the instruction set?