Five earth stations share one transponder with a bandwidth of 36MHz on a 6/4 GHz satellite using TDMA. The earth stations each transmit bursts at a symbol rate of 7.5 Msps. A TDMA system is established using a 125 us frame time. Find the symbol rate at an earth station within the TDMA frame when: i. ii. iii. No time is lost in overheads or preambles. A5s preamble is added to the beginning of each earth station's transmission. A 5s preamble is added to each station's transmission and 2 us guard band is allowed between every transmission.