Answer the following questions carefully and correctly.

Question $4$

Assume that the link layer uses the flag bytes with byte stuffing approach for framing, with the following details:

The beginning of a data frame is indicated by the special flag bytes: START

The end of a data frame is indicated by the special flag bytes: FIN

The special escape bytes STH are used for escaping accidental occurrences of either the flag bytes or the escape

bytes within the data.

The following byte stream represents data that needs to be framed by the link layer on the sender$\text{'}$s side. Derive the

resultant byte stream by adding necessary flag bytes and performing byte stuffing.

ITISHOWYOUSTARTTHATRULYCHANGESTHINGS

Do not include any leading or trailing spaces in your answer. Question $5$

Assume that the link layer uses the flag bits with bit stuffing approach for framing, with the following details:

The beginning and end of a data frame are indicated by the special flag bits $01111110($i$.$e$.,0$x$7$E$).$

To handle accidental occurrence of the flag bits within the data, a $0$ bit is stuffed every time $5$ consecutive $1$ s are

found in the data.

The following bit stream represents data that needs to be framed by the link layer on the sender$\text{'}$s side. Derive the

resultant bit stream by adding necessary flag bits and performing bits stuffing.

$0011110111111011110011011001111101011111100110$

Do not include any leading or trailing spaces in your answer.