Suppose a $100$ Mbps $($Megabits per second$)$ point$-$to$-$point link is being set up between Earth

and a new lunar colony. The distance from the moon to the Earth is approximately $385,000$

Kilometers. Data travel over the link at the speed of light $-3108$ meters per second.

Calculate the minimum Round$-$trip Time $($RT$\text{'}$T$)$ for the link.

Using the RTTT as the delay, calculate the delay $x$ bandwidth product for the link.

We would like to transfer a $50MB($Mega Bytes$)$ file from the lunar colony to

Earth. How much time will it take to transfer the file? Please include propagation

delay in your calculations.