As a particle moves along an x axis, a force in the positive direction of the axis acts on it. Figure shows the magnitude F of the force versus position x of the particle. The curve is given by F = a/x2, with a = 9.0 N · m2. Find the work done on the particle by the force as the particle moves from x = 1.0 m to x = 3.0 m by
(a) Estimating the work from the graph and
(b) Integrating the force function.