13. Suppose an 802.11b station is configured to always reserve the channel with the RTS/CTS sequence. Suppose this station suddenly wants to transmit 2,500 bytes of data, and all other stations are idle currently. As a function of SIFS and DIFS, and ignore propagation delay and assuming no bits errors, calculate time required to transmit the frame and receive the acknowledgement. (Assume the transmission rate of 802.11b is 10Mbps, SIFS is 20 μs, DIFS = SIFS + 2 * slot time, CTS=RTS=ACK=slot time, and slot time = transmission time of an empty frame which is 125 bytes)