After you finish the router prototype, you need to test it with difterent packet switching technologies, which may have different MTU. In a test, your router has $3$ links with MTU as below: Link MTU$($in bytes$)160242031000($i$).$ The router receives a $600-$byte IPv$4$ packet from link $3,$ and it needs to send it to link $2.$ What will happen? Which header fields need to be updated? ii$).$ If the $600-$byte IPv$4$ packet from link $3$ has $20$ bytes header, at least how many packets need to be sent over link $2?$ Write down the value of total length, flag and fragmentation offset fields of each outgoing packet. $($iii$)$ The router receives $20$ fragmented packets from link $1,$ and needs to send them to link $3.$ How many packets will be sent over link $3?$