We want to increase MARIE$$s memory size from $4$K to $16$K$.$ This means that the operand size

for instructions like Load, Add and Jump have to increase. Answer the following questions.

a$.$ What is the new instruction format$$s size $($previously it was $4-12$ for the op code, operand$)?$

b$.$ The increased instruction size means not only are we increasing memory$$s size in words but the size of the word. The new memory size is $16$KxY$.$ What is Y$?$

c$.$ All of the following will have to change in size. What is the new size for each?

MAR, MBR$,$ PC$,$ IR$,$ AC$,$ ALU, address bus, data bus