Nodes A and B are on a common shared line and the propagation delay between them is equal to 325 bits of time. Consider using CSMA / CD and Ethernet packets on a common shared line. Consider that node A starts transmitting at time t = 0, and node B begins transmission before A finishes transmission. (A is transmitting a packet whose transmission will take a total of 580 bits of time). a) In the worst case scenario, when will the signal of node B reach A? Could Node A complete its transmission before it realized that B was transmitting? Why is that? b) At what time does Node B start sending the packet at the latest? Why is that?