You have a network with three IP subnetworks, as shown in the figure below. Use the figure to answer the following Prelab questions. Network 1 Network 2 Network 3 R1 R2 1. In order for A and B to send packets to each other, what IP forwarding table entries do R1 and R2 nced? RI and R2 do not need to be told about networks directly connected to them. 2. What device should A use as a default gateway