Q # 3 in CSMA/CD, after the fifth collision, what is the probability that a node chooses K-4? The result K-4 corresponds to a delay of how many seconds on a 10 Mbps Ethernet? Q # 4 Consider a 100 Mbps 100BASE-T Ethernet with all nodes directly connected to a hub. To have an efficiency of 0.50, what should be the maximum distance between a node and the hub? Assume a frame length of 64 bytes and that there are no repeaters. Does this maximum distance also ensure that a transmitting node A will be able to detect whether any other node transmitted while A was transmitting? Why or why not? How does your maximum distance compare with the actual 100 Mbps standard