Part 1: In an IEEE 802.11b WLAN BSS, where only the Distributed Coordination Function is operational station STA needs to send two data frames to station STA, via the access point AP using the 2-way frame exchange. Assume that each station always chooses the same random number for the contention window as follows STA, always chooses 2. AP always chooses I. and STA, always chooses 0. Also, assume that SIFS-10ps, DIFS-50us, Slot Time = 204s, ACK=14 bytes, RTS=20 bytes CTS=14 bytes, Data Frame Header =34 bytes, the transmission rate R = 11 Mbps, and the payload of each data frame is 2312 bytes. a) Draw an approximate timing diagram showing all the transmitted frames until the two data frames are delivered to STA. b) What is the percent overhead associated with transmitting the two data frames? c) What is the effective throughput achieved by sending the two data frames? Elaborate on the result, Part 2: Repeat Part I assuming 4-way frame exchange. Determine the percent change in performance compared to Part I. Part 3 Repeat Part I assuming 4-way frame exchange and that each frame is fragmented into two equal-size fragments. Determine the percent change in performance compared to