$1\mathrm{.}4-3$ End$-$to$-$end delay. Consider the scenario shown below, with $10$ different servers $($four shown$)$ connected to $10$ different clients over ten three$-$hop paths. The pairs share a common middle hop with a transmission capacity of R $=200$ Mbps$.$ Each link from a server has to the shared link has a transmission capacity of RS $=25$ Mbps$.$ Each link from the shared middle link to a client has a transmission capacity of RC $=50$ Mbps$.$

Now consider the three$-$hop path from Server$-10$ to host$-10,$ assuming the values of Rs$,$ Rc$,$ and R given above. Assume also that a packet is $1000$ bits long, and that each link has a propagation delay of $100$ microseconds $(1$ microsec $=0\mathrm{.}000001$ sec$).$ You can assume that queueing delay and nodal processing delays are zero. What is the total amount of time from when a server starts sending a packet until a host completely receives that packet?

Question $3$ options:

$325$ microseconds

$365$ microseconds

$735$ microseconds

$450$ microseconds

$350$ microseconds

$555$ microseconds

Question $4(1$ point$)$