a small meteorite becomes visible directly above

a small meteorite becomes visible directly above an observatory. it travels in a straight path at 300 m/s and takes 20 seconds to hit the ground 2500 m east of the observatory.

A) how many metres does the meteorite travel from first being observed to when it hits the ground?

B) what was the meteorites angle of depression, to the nearest degree?

C) to the nearest metre, how far above the observatory was the meteorite when it first became visible?