The equation below shows the mathematical representation(s) for mechanical work done on a system by an average force external to that system; thus, "work" here means "external work." Match each term in the equation with the correct description from this list: (1) Average External Force Vector; (2) Magnitude of the Average External Force Vector; (3) Change in Position Vector; (4) Magnitude of the Change in Position Vector; (5) Angle Between the External Force Vector and the Change in Position Vector; (6) Work (a) (a) W = Fext AF = |ext||A7| cos Ar (b) (c) (d) (e) (f) (b) (d) (c) (e) (f) [Choose ] Work Magnitude of the Average External Force Vector Change in Position Vector Average External Force Vector Angle Between the External Force Vector and the Change in Position Vector Magnitude of the Change in Position Vector [Choose ] [Choose ] [Choose1