A ship leaves port at noon and has a bearing of S 24° W. The ship sails at 20 knots. At 6:00 P.M., the ship changes course to due west.

a. How many nautical miles south and how many nautical miles west will the ship have traveled by 6:00 P.M.?
b. Find the ship's bearing and distance from the port of departure at 7:00 P.M.