IV. EFFECTS OF CURVATURE AND REFRACTION (30 pts.) Considering the effects of curvature and refraction, the difference in elevation of points B and C is found out to be 111.356 m. From point A in between B and C, the angle of elevation of B and C are 18°30' and 8°15' respectively. < 1. 2. 3. C If B is higher than A, and C is 2000 m from A, how far is B from A? If the elevation of A is equal to 200 m, find the elevation of B. Find the elevation of C.