$1)$ The transport layer at the receiver received the following segment.

$10110110000111100001$

where the last $5$ bits represent the checksum, does the message arrive error free?

$2)$ Derive a comparison between byte$-$stuffing and bit$-$stuffing?

$3)$ Byte$-$stuff the following payload $($data$),$ E is the escape byte, $F$ is the flag byte, and $D$ a

data byte other than escape of a flag character:

D E D D F D D E E D F D

$4)$ Bit stuff the following frame payload:

$00011111110011111010001111111001$