Consider two machines, A and B, connected by a 100 Mbps Ethernet with three store and forward relay switches in path between them. Suppose that no other machines are using the Ethernet, that each link introduces a propagation delay 12 microsecond, and that switch being transmitting a packet immediately after receiving the last bit of packet. What is the total transfer time for a 1500 bytes packet, as measured from transmission of first bit from A to receipt of last bit at B?