D | Question 3 3 pts On a channel that's using 1-persistent CSMA/CD with Binary Exponential Backoff, two terminals are trying to transmit a frame, what is the probability that the contention ends on round 3? D Question 4 3 pts What is the efficiency of bitmap protocol, under low load, when only one terminal sends at any given time? Assume that there are N terminals contending for the channel and each frame carries d data bits. o d/(d+N) o 1/N o 1/11+N) D Question 5 3 pts What is the efficiency of bitmap protocol, under high load, when all terminals have frames to send? Assume that there are N terminals contending for the channel and cach frame carries d data bits. O 1/d O 1/N d/ld-N)