9&10 pls

Shiloh is using an air compressor to launch tennis balls into the air, One ball that she launches directly upward has an initial velocity of 19 m/s. How long will it take for the ball to reach the ground again? 0 3.95 O 4.9 S 0 5.6 s O 3.1 s Question 10 10 pts Lars is standing near the edge of a 90-meter cliff. He throws a ball upward, but does not catch it, and it falls to the bottom of the cliff face. From when he threw the ball upward to when it hit the ground below, 5.55 seconds passed. What was the initial vertical velocity of Lars' throw? O 11 m/s -11 m/s O -43 m/S 43 m/s