Compute each part of given problem:
Problem: A certain airplane has a speed of 261.9 km/h and is diving at an angle of 33.0° below the horizontal when the pilot releases a radar decoy. The horizontal distance between the release point and the point where the decoy strikes the ground is d = 687 m.
Part A: How long is the decoy in the air?
Part B: How high was the release point?
Please use great detail in explaining the solution. Thank you.