Host A and B are connected with an Ethernet LAN. CSMA/CD is used in their communication. Suppose the end-to-end distance between A and B is 500 meters. The channel speed is 10 Mbps and the propagation speed is 200 m/μsec. Suppose at time 0, A has a 512-bit packet to send to B, and after 2 μsec, B also has a 512-bit packet to send to A. Will the transmission of A and B collide? Describe your reasons. If a collision happens, when will A detect it?