7. Consider the network below. Assume that flooding is used as a routing protocol at the network layer and stop-and-wait algorithm is used at the data link layer. Assume that router w is about to send a packet of size 500 bits to router z (the packet has a "hop count" field). Let the cost shown on a link refer to the link. The data rates of routers t, u, r, w, x, y, and z are time in msec over that 50, 10, 100, 40, 20, 200, and S0 that the "hop count" field is set based on the network diameter, how many packets will reach router z through routers t, u, and 12 a. Two packets through router v, and no packets through routers t or b. One packet through router v, one packet through router t, and one packet throuh router u c. No packets through these routers d. None of the above ofthe 8. Continuing with Question (7), how long it will take router z to receive a second sent packet? a. 44 msec b. 54 msed c. 51.5 msec d. 61.5 msec