A baseball is seen to upward by a window 28 m above the street with a vertical

Question:

A baseball is seen to upward by a window 28 m above the street with a vertical speed of 13m/s. If the ball was thrown from the street
(a) What was its initial speed?
(b) What altitude does it reach?
(c) When was it thrown, and
(d) When does it reach the street again?