I really need help with this practice question#3 pleasee.

2. Steve leaves Tony at Point P. Steve walks 4 km on a bearing of 040. then a further 6 km on a bearing of 155 to reach to the camp site to get some medical supplies. To save time. he hikes directly back to point P from the camp site. a) Draw a diagram to illustrate the situation. b) What is the direct distance from Point P to the camp site? c) On what bearing should Steve walk back from the camp site to return to point P. 3. As it gets darker outside. Steve is lost in the woods. and he calls for help. A helicopter at Point A (6. 9. 3) moves with constant velocity in a straight line. 10 minutes later it is at Point B (3. 10. 2.5). Distances are in kilometres. a) Find Vector AB. b) Find the helicopter's speed. in kmfhour. c) Determine the vector equation of the straight line path of the helicopter. d) Steve is at point U (7. 2. 4}. determine the shortest distance from point U to the path of the helicopter