Assume A and B are connected via a direct link of bandwidth B bps. Let the one-way propagation delay be equal to T, sec. The maximum frame size is equal to P bits. The receiver B has an infinite buffer that it can allocate for the connection (but can also limit it to any desired number). (a) Calculate an expression for the minimum number of bits that should be allocated for this connection to enumerate the transmitted frames so that the receiver never receives any frames out of order and the link is always kept full. Explain your answer in detail. (b) Revise your answer if we also want to minimize the number of retransmissions in the event of frame loss. (c) Express the SWS and the RWS as a function of B, Tp, and B.