Problem 1.

Assign 3 pts for a reasonable attempt.  Deduct 1 point for incorrect
data packet transmissions, 1pt for incorrect use of DIFS, 1 pt for
incorrect use of SIFS, 1 pt for incorrect ACK transmissions, and 1 pt
for incorrect backoff implementation.

Problem 2.

1 pt for Polls, 1 pt for SIFS, 1 point for ACKs, 1 point for correct
voice frame length, and 1 point for CF-END & other packets.  Assign at
least 1 point for a reasonable attempt.

Problem 3.

Do not worry about LLC headers.  In each part, assign 1 point for MAC
headers and 1 point for IP headers.

Problem 4.

1 + .5 + .5 + 1 + .5 + 1 + 1 + .5 + 1 + 1

Problem 5.

7 + 7 + 4

(a) 2 pts formulae, 2 pts correct application of formulae, 1 pt
BER->FER, and 2 pt final plot

(b) 2 pts formulae, 2 pts correct application of formulae, and 3 pts
final plot

(c) 2 pts for pointing out intersection, and 2 points for final plot.