4. Suppose a 512kbps point-to-point link is set up between the Earth and a rover robot on the Mars. The closest distance between the Earth and the Mars is 55Gm (55*1049 m), and data travels in speed of light (3*10+8 m/s). (15 points) .a) calculate the minimum RTT for the link b) calculate the delay*bandwidth product for this link (in bits). c) the rover is taking a picture of 5MB and sending the picture back to the Earth. How quickly afte the picture is taken can it reach the Earth