A stone is thrown vertically downward from a balcony with a speed of 12m/s. After 3s it reaches the top edge of a vertical window that is 8m high. Take g=9.8m/s2 downward.
a. (i) Find the speed of the stone as it reaches the top edge of the window.
b. (ii) How much additional time does it take to pass completely past the bottom edge of the window?