hello if you please answer these questions thanks!

22. A ship's course is set at a heading of 220 and travelling at 15 knots. The current is on a bearing of 100 and travelling at 5 knots. What is the ground velocity and bearing of the ship? (5 marks)21. A ladder 5 m long is leaning against a vertical wall. If a person pulls the bottom of the ladder away from the wall at a rate of 0.5 m/s, how fast is the top sliding down the wall when the bottom of the ladder is 3 m from the wall? (4 marks)A closed top storage box with a square base has capacity of 64 m'. Find the dimensions that will minimize the surface area of the box. (7 marks) h X