In a 10 Mbps CSMA/CD bus of length 200 meters, nodes A and B are the two nodes furthest from each other. Suppose the speed of propagation is 2 x 108 m/s. Frames are 10000 bits long. It takes a node 100 bit transmission times to detect a collision and abort transmission. Suppose node A starts transmitting a frame at time t0 = 0.

At what time does node A capture the channel, i.e., is no longer vulnerable to collisions?

Suppose node B starts transmitting a frame at time t1 = 0.5 s. Will this transmission collide with A's transmission? If so, when do the two nodes detect the collision, and when does the channel

become idle, i.e., no signals in transit, assuming there are no other frame transmissions.