2. Consider four wireless nodes (W, X, Y, and Z) in a network with the following characteristics. - X can hear transmissions from W. - W and Y can hear transmissions from X. - X and Z can hear transmissions from Y. - Y can hear transmissions from Z. a. While Wis transmitting to X, what other non-interfering transmissions are possible? (10 points) b. While X is transmitting to W, what other non-interfering transmissions are possible? (10 points) c. While X is transmitting to Y, what other non-interfering transmissions are possible? (10 points) d. While Y is transmitting to X, what other non-interfering transmissions are possible? (10 points)