Question 4 [8 marks]: A particular CPU with 16 bit accumulator has instruction set that may consists of two parts : the opcode (1 byte) and the immediate operand or an operand address (3 bytes). (a) What is the maximum addressable memory capacity (in bytes) that the instruction can address? (b) If the microprocessor bus has a 32-bit address bus and a 16-bit internal data bus what will be the clock cycles required to (i) address the memory (ii) fetch the instruction and (iii) to execute arithmetic operations on 16 bits numbers (c) What will be the clock cycles required in (i), (ii), (iii) in part (b) above, If the microprocessor has a 16-bit address bus but now with 8-bit internal data bus. (d) How many bits are needed for the program counter and the instruction register? *