An observer for a radar station is located at the origin of a coordinate system. For the point given, find the bearing of an airplane located at that point. Express the bearing using both methods. (8.0) a. 270degree; N 90degree W or S 90degree W b. 270degree; N 90degreeE or S 90degree E c. 90degree; N 90dgree E or S 90degree E d. 90degree; N 90degree W or S 90degree W