Refer to Figure 3 and answer the following questions as concisely as you can. In answering these questions, you'll need to google and look up relevant information on ICMP Redirect, e.g., on wikipedia. a. (4 points) Consider the following scenario: host A wants to send an IP packet to host D, which is connected to LAN 2 (IP network prefix: 112.10.128.0/20). Since host D is not on the same IP network as host A. Hence host A will send it to its default gateway router R1. Describe the actions taken by router R1 (and subsequently at router R2) at both the network layer and data link layer for sending this IP packet to host D. You can assume that R1 has the MAC address of R2, and R2 has the MAC address of host D. b. (4 points) Continue the scenario in problem 8.a: suppose host A wants to send another IP packet to host D. Will host A stl send it to router R1? Or will it send it to router R2? Hint: f you did not mention ICMP Redirect message in your answer to problem 1.a, your