we are sending a $30$ Mbit MP$3$ file from a source host to a destination host. All links in the path between source and destination have a transmission rate of $10$ Mbps$.$ Assume that the propagation speed is $2*108$meters$/$sec$,$ and the distance between source and destination is $10,000$ km$.$

Now suppose that the MP$3$ file is broken into $3$ packets, each of $10$ Mbits. Ignore headers that may be added to these packets. Also ignore router processing delays. Assuming store and forward packet switching at the router, the total delay is

Group of answer choices

$4\mathrm{.}05$ seconds

non of the above

$3\mathrm{.}05$ seconds

$6\mathrm{.}05$ seconds