please answer all the questions

4. Study the mini-scenario below and answer the question. (total 20 marks). Known data: - PCO default gateway points to 10.10 .10 .1 - PCl default gateway points to 172.16 .16 .1 - Routing tables: R3 Questions: 1) When PCO sends a PING packet to PCl, do you think if the roundtrip packet across two offices is a symmetric transmission (i.e. in and out paths are same)? Briefly explain your answer. (5 marks) 2) How can you fix it if your above answer is negative? Or explain above if your answer is positive. (5 marks) 3) Now you need to ensure 2Mbps link is the primary link for communication between PCO and PCl and 128kbps link is just a standby (for backup purpose). How can you configure floating static route(s) to achicve that? (10 marks)