Suppose a file of 10,000 bytes is to be sent over a line at 2400 bps. a. Calculate the overhead in bits and time in using asynchronous communication. Assume one start bit and a stop element of length one bit, and 8 bits to send the byte itself for each character. The 8-bit character consists of all data bits, with no parity bit. b. Calculate the overhead in bits and time using synchronous communication. Assume that the data are sent in frames. Each frame consists of 1000 characters = 8000 bits and an overhead of 48 control bits per frame. c. What would the answers to parts (a) and (b) be for a file of 100,000 characters? d. What would the answers to parts (a) and (b) be for the original file of 10,000 characters except at a data rate of 9600 bps