Question: A hunter on the ground fires a bullet in the north-east direction which strikes a deer 0.25 miles from the hunter. The bullet travels with a speed of 1800 mi/h. At that instant when the bullet is fired, an airplane is directly over the hunter at an altitude h of one mile and is travelling due east with a velocity of 600 mi/h.
Part A: When the bullet strikes the deer, what are the coordinates as determined by an observer in the airplane?
Don't just give me the answer, explain your steps as well.