Question Three A digital computer has a memory unit with 24 bits per word. The instruction set consists of 150 different operations. All instructions have an operational code part (opcode) and an address part allowing for only one address. Each instruction is stored in one word memory. a) How many bits are needed for the opcode? b) How many bits are left for the address part of the instructions? d) What is the allowable size of the memory? (5 Points)