bearing (1) quick

1. A ship sails from point A at a bearing of 155° to poinr B. If it has to sail from point B back to point A, what direction should the ship sail? (ANS. 335° /N25°W)

2.Two ships B & C depart from port A at ther same time. Ship B sails 8 km at a bearing of S45°W and then then stops. Ship C sails 12 km at a bearing of S57°E and then stops. After both stopped,
(A)what is the distance between ships B and C? (15.7km)
(B)find the compass bearing of ship B from ship C. (N86.8°W)

3.Jacky walks 2 km due east and then 3 km due south. Find the true bearing of his final position from the starting point.

4.A man starts at O and walks 2 km at a bearing of N27°E to A, and then turns 90° to his right and walks 1 km to B. What is the compass bearing of B from O?

5.There are two routes to go from A to B. The first route is to go 350m at a bearing of N50°W and then 1000m at a bearing of N40°E. The second route is to go east and then north.
(a) Find the length of the second route.
(b) Find the difference in length between these two routes.