3- A computer uses a memory with 8 bits in each addressable word. It has the following registers: PC and AR, which are used for addresses only and AC, DR, IR, TR (32 bits each). A memory-reference instruction consists of 32 bits; an 8-bit operation code and an address (in the next three bytes). Memory size a. What is the size of the memory for this computer? b. What is the size of the memory if the addressable memory word is increased to 16 bits c. By how many addresses AR and PC are incremented to point to the next instruction, if the Memory size memory word is 8 bits Address step d. By how many addresses AR and PC are incremented to point to the next instruction, if the memory word is 16 bits Address step e.How many opcodes can be generated by this computer? opcodes