15. Three forces v1, V2 and V3 are located in the xy plane as given in Figure 1. Their magnitudes and angles with respect to the x axis are given in Figure l. a) Write each force in component form (6 points) b) Determine the resultant force acting on an object located at the origin in Figure 1 above. (2 points) 16. Use the Divergence theorem to calculate the value of the surface integral given as H5 F - 71615 Le calculate the ux of F across S where F is given by the vector F = and S is the surface of the box bounded by the coordinate planes and the planes x = 3, y = 2, and z = 1. (The triple integral in the Divergence theorem will be much shorter to do). (5 points)