b) X and Y are two important registers involved in the CPU - RAM communication. Answer the following questions by examining Figure 2 below: a byte bito 000 individual 001 address line memory cells X address decoder bit n 21.1 Y (i) Figure 2: CPU-RAM communication Identify the two registers X and Y. (2 marks) Assume a WRITE operation is being performed, explain how register X and Y work in this CPU-RAM communication. (6 marks) (ii)