Please solve both a and B part

3. What do you understand by multiplexing? Explain the working of Frequency Division Multiplexing with the help of transmitter and receiver block diagram. Comment on the bandwidth of FDM signal. b) Five channels (A, B, C, D and E) are multiplexed using synchronous Time Division Multiplexing. Given that each channel send 100 bytes/sec and byte-interleaving technique is used, draw one complete frame that travels on the link. Also compute the size of the frame in bits