What is the overhead and throughput for a system that uses f

What is the overhead and throughput for a system that uses frames that includes four 7-bit ASCII characters, one start bit (for the entire frame) and ends with one stop bit. Each ASCII character has one even parity bit following it.

7bit ASCII Characters in a Frame

overhead = 82.4%, throughput = 17.6%

overhead = 17.6%, throughput = 82.4%

overhead = 22.0%, throughput = 88.0%

overhead = 0.880, throughput = 0.120

overhead = 83.3%, throughput = 16.7%

overhead = 16.7%, throughput = 83.3%

Solution

There is 5 number of 7 bit ASCII is there in the frame = 35 bit (data/information)

There is also 1 start bit, 5 end bit and 1 even parity bit in the frame = 7 bit (extra bits about the data/overhead)

So, we have total 42 bit in the frame

So basically in a 42 bit frame we are carry 7 extra bits so the over head = (7/42)X100 % = 16.7%

Similarly, in a 42 bit frame we are carry 35 extra bits so the throughput = (35/42)X100 % = 83.3%

So, below option is correct.

overhead = 16.7%, throughput = 83.3%