Section C — Practical / Procedural (15 marks) 15. (10 marks) Given the following scenario, write a clear step‑by‑step procedure (numbered steps) to update the Tenda F3 firmware via the router’s web interface, including safe precautions and verification steps after update. (Assume Windows PC connected by Ethernet; the firmware file is already downloaded and verified.) 16. (5 marks) You performed an update and the router no longer shows a working WAN connection but LEDs indicate it boots normally. List five troubleshooting steps to restore Internet connectivity.