I need the answers of these big 5 questions;

1 ) A car is moving at a velocity of 120 km/h. Convert velocity to metre persecond. 2) A co moving at 12 m/S come to a top within 8m, what was its acceleration ? 3 ) A cor speeds up from 3 m/s at an acceleration of 2 m/s ? . what a displacement is made in los? 4 ) A toy car is moving at 2 mls in a straight ling and is decelerating at D.4 m/s. How long does it take to reverse its direction of motion? 5 ) If you launch a marble vertically at a speed of 19 m/s what is the maximum height will it reach