(a) the line y=4 meets the line 2x+y =8 at the point A. find the co-ordinates of A. (b) the line 3x+y=18 meets that x axis at the point B, find the co-ordinates of B.

(c) I) fin the co-ordinates of the mid point M of the line joining A to B.

ii) find the equation of the line through M parallel to 3x+y=18

An observer(o) spots a plane(p) taking off from a local airport and flying at a 29 degree angle horizontal to her line of sight and located directly above a tower(t). the observer also notices a bird circling directly above her. if the distance from the plane(p) to the tower(t) is 6,000ft., how far is the bird(b) from the plane(p).