Solve the all parts of following question given below:

Question: A helicopter is flying in a straight line over a level field at a constant speed of 5.50 m/s and at a constant altitude of 8.70 m. A package is ejected horizontally from the helicopter with an initial velocity of 11.0 m/s relative to the helicopter and in a direction opposite the helicopter's motion.

Part I: Find the initial speed of the package relative to the ground.

Part II: What is the horizontal distance between the helicopter and the package at the instant the package strikes the ground?

Part III: What angle does the velocity vector of the package make with the ground at the instant before impact, as seen from the ground?

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