4) Sketch the graphs of the following trigonometric functions for two full periods. a) y= - 4 sin ( - 5) b ) y = 4 cos ( ; + = ) 5) A ship leaves port at noon and heads due west at 20 nautical miles per hour. At 2:00 pm, to avoid a storm, the ship changes course to 540 West of North. a) Find the ship's bearing and distance from the port of departure at 3:00 pm. b) Sketch a diagram to illustrate the situation above. 6) A plane leaves the airport on the bearing of 45 traveling at 400 mph. The wind is blowing at a bearing of 135 at a speed of 40 mph. What is the actual velocity of the plane