g&t homework, pleasse help draw the diagrams first

thanks.

1. the pilot of an aircraft flying due South, at an altitude of 750m, sees an airfield directly ahead, angle of depression 17°. at the same time the pilot notices a town due east, angle of depression 10°. how far is town from airfield?

2.from the top of a cliff 120m above sea level a boat is observed due North, angle of depression 20°. the boat travels due east and, 10min later, its angle of depression from the top of the cliff is 10°. how fast is the boat moving?

3. a river runs east to west. a tree stands on the edge of one bank and from a point C, on the opposite bank and due south of the tree, the angle of elevation of the top of the tree is 28°. from point D, 65m due east of C the angle of elevation of the top of the tree is 20°

calculate a) height of tree

b)width of river at C.