a) List 3 pairs of devices that connect between each other by Bluetooth communication. [3] b) Consider the following network topology (See Figure 3 below): u 2 2 W ~ 2 3 X 3 Y 3 1 2 Figure 3. Network topology diagram N Construct the stepwise Dijkstra's table, forward table from u and shortest path tree from u (to any nodes) for the network topology diagram of Figure 3 using the Dijkstra's Algorithm. [12]