Question: An end-host, A, sends a UDP packet across the Internet to a destination, B. An intermediate IP router, R, detects a problem in the packet

An end-host, A, sends a UDP packet across the Internet to a destination, B. An intermediate IP router, R, detects a problem in the packet (the TTL field reaching a value of 0). The router, R, drops the packet and generates an ICMP error message and sends it back to the source. Provide reasonable sketches of the following packets, while highlighting all relevant field values in the IP, UDP and ICMP headers involved:

The original packet transmitted from A to B
The ICMP error packet transmitted from R to A

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