Bearing questions - plz help(SOLVED)

1.A hiker walks due north from A and after 8km reaches B. She then walks a further 8km on a bearing of 120degrees to C. Work out a the distance from A to C and b the bearing of C from A.

2.A helicopter flies on a bearing of 200degrees from A to B, where AB =70km. It then flies on a bearing of 150deg from B to C, where C is due south of A. Work out the distance of C from A.

3.Two radar stations A and B are 16km apart and A is due north of B . A ship is known to be on a bearing of 150deg from A and 10km from B. Show that this information gives two positions for the ship, and calculate the distance between these two positions.

Any help or hint on how to solve will be much appreciated.

Thanks in advance

dee