A compound curve passes thru a common tangent line AB having an azimuth of 281°. The radius of the first and the second curve are 250 meters and 130 meters respectively. The azimuth of the back tangent of the compound curve is 250° while the length of curve of the second curve is 100 meters. a) It is desirable to substitute the compound curve with a simple curve that shall have the same location of the point of curvature, find the radius of that simple curve. b) It is desirable to substitute the compound curve with a simple curve that shall have a minimum clearance of 85 meters from the point of intersection of the compound curve, determine the length of the new simple curve. c) If the stationing of the old point of tangency is 20 + 350, find the stationing of the new point of tangency.