Before we can store (save) or retrieve (load) data in and out of the main memory, we need to provide the memory address to the memory control unit. This address uniquely identifies one single location (word or record) of the memory. Suppose this address is placed in Memory Address Register (MAR) prior to each memory access. What is the size of MAR for a 16MB RAM? (RAM is word- addressable and each word is 2 bytes). Show all the work