For questions 18-20, consider the following description: Consider the following system that uses synchronous TDM to multiplex. Assume that the MUX appends an even parity bit to each frame and adds one synchronization bit before each frame. If the data rate of the channel is 100 kbps. Answer the following: T3 12 TI 1010 1101 1111 Sender 1000 1001 1001 Sender 2 MUX 1100 0111 0111 Sender 3 18. (1.5 points) The output frame rate will be a. 7142 frame/sec b. 8333 frame/sec c. 25000 frame/sec d. 33333 frame/sec e. None of the above. 19. (1.5 points) The output bit rate will be a. 32888 bps b. 28568 bps c. 100 Kbps d. 133332 bps 20. (1 point) If the system above uses Statistical TDM instead of synchronous TDM, the results will be always the same. a True b. False