4. Given an IP packet (with no IP options) of 3500 bytes (a) After the packet has been forwarded through a link that can only support IP packets up to 1300 bytes, please write down the "IP Header Length (IHL)" Total length" Fragment offset" and "More Fragment (MF)" of all IP fragments. [2) (b) After these fragments have been forwarded to the next link that can only support IP packets up to 1020 bytes, please write down the "IP Header Length (IHL)", Total length", "Fragment offset" and "More Fragment (MF)" of all IP fragments of the original 3500-byte IP packet. [2 (c) Why does IP adopt destination reassembly, instead of hop-by-hop reassembly? 12) (d) The packet has the source IP address of 142.104.58.19 and the destination IP address of 104.212.50.51.-A router received this packet has the following forwarding table. Which output interface the router should choose to send out the packet? [2) Destination network Netmask Output interface 142.104.32.0 142.104.48.0 19 20 42.104.560 21 20 1500, 128 3 142.104.1120