Physics question

3. A bullet is fired straight up with initial speed of Vo from the edge of a cliff (see following figure), the cliff is h above the ground. (a) what is the velocity of the bullet when when it passes by the edge of the cliff (the original point) again falling down from the highest point? (b) what is the velocity of the bullet right before it hits the ground? No air resistance, please identify both magnitude and direction of the velocities. val 4. A stone was dropped (from rest see the figure at below) from the edge of a cliff which is H above the sea level. And the sound of the stone hitting the sea surface is heard 8.0 s later by people at the edge of the cliff. What is the height of H? The speed of sound in air is 340 m/s, no air resistance. .O