UNIT $-$ IV

Consider a packet with a total length of $250$ bytes $($including IPv$4$ header, with no options$)$ and an id field equal to $17,$ sent from a host $A$ to a host $B,$ passing through routers $x$ and $Y.$ Assume that the subnet where host $A$ is connected has an MTU of $500$ bytes, the subnet where host B is connected has an MTU of $80$ bytes and the subnet between X and Y has an MTU of $120$ bytes. Assuming that the "don't fragment" flag is not set, how many fragments does router $x$ divide the packet into? What is the length of each fragment?

Complete the diagram below so that it represents the first two fragments forwarded by router $Y($not X$).$ Fill in all the blanks.