8. (15 pts)A rocket that is launched vertically is tracked by a radar station located on the ground 4 miles from the launch site. What is the vertical speed of the rocket at the instant its distance from the radar station is 5 miles and this distance is increasing at the rate of 3600 mi/h? Your answer should be in sentence form, and should include the appropriate units. Note: This one has 5 pts bobus ( so if you get 10pts that is 100% for this question). God the derivative of / ( )