Please show all work, step by step. Thank you so much!

7. (10 pts) You are observing an airplane from a point x = 3000 feet away on the ground. The airplane is flying away from you horizontally at 200 ft/sec at an altitude of y = 2000 ft. 8. V= dx at y a. What is the angle of elevation @? (include units, whether radians or degrees) b. If positive x is to the right, what sign does v = = have? (+ or -) C. How fast is the angle of elevation changing? (i.e. find ) Is the change + or - ? Express your answer in - deg sec