A pilot is flying over a straight highway. He determines the angles of depression to two mileposts, 5 mi. apart, to be 32 degrees and 48 degrees as shown in the figure.

a) Find the distance of the plane from point A.

b) Find the elevation of the plane.

imgur: the simple image sharer

Obviously the large angle of the triangle is 100 degrees. I've tried sketching right triangles here and there but can't get an accurate distance because it isn't directly in the middle of the 5 mi. gap.

So how do I go about solving this using the Law of Sines? Help please Thanks in advance.