write the following questions out on a sheet of paper with complete explanation 4) A ship is travelling at a heading of 220 at a speed of 14 knots. A current is flowing at a speed of knots, at a bearing of 060. What is the ship's ground speed? 5) Devon is holding his father's wheelchair on a ramp inclined at an angle of 20 to the horizontal with a force of magnitude 2000 N parallel to the surface of the ramp. Determine the weight of Devon's father and his wheelchair and the component of the weight that is perpendicular to the surface of the ramp 6) A 75 N box is held by two cables fastened to the ceiling at angles of 80 and 70 to the horizontal. Determine the tension in each cable