A first-in first-out (FIFO) is a memory unit that stores information in such a manner that the item first in is the item first out. Show how a FIFO memory operates with three counters: a write counter WC that holds the address for the memory write operation; a read counter RCthat holds the address for the read operation; and an available storage counter ASC that indicates the number of items stored. ASC is incremented for every item stored and decremented for every item that is retrieved. The memory unit communicates with MAR and MBR.