$3$A$)$ Sketch the wave form for the bits $"1011001"$ using Manchester, Differential Manchester and NZR$-$I

encoded techniques and identify the relationship between Baud rate and bit rate for these

techniques.

$3$B$)$ A want to send data to $B$ wherein he uses the hamming code technique for error detection and

correction. Assume that data word is $1101010,$ Compute the code word sent from A to B and

illustrate the steps used by receiver B to accept the code word sent from the sender A$.$

$3$C$)$ A station needs to send a message consisting of $9$ frames to station $B$ using sliding window $($window

size $=3)$ and Go Back $N$ error control strategy. All packets are ready for transmission. If every $5$ th

frame A sends gets lost $($but no ACK s from B ever get lost$),$ then what is the number of packets

that A will transmit for sending the message to $B.$