HW05: Problem 11 Previous Problem List Next (1 point) Jessica and Matthew are running toward the point P along the straight paths that make a fixed angle of θ (Figure 1). Suppose that Matthew runs with velocity va (m/s) and Jessica with velocity v> (m/s). Let f(x, y) be the distance from Matthew to Jessica when Matthew is x meters from P and Jessica is y meters from P. FIGURE 1 . Show that f(x, y) = Vx2 + y-2xy cos θ. ·Assume that θ-Ï/3. Use the Chain Rule to determine the rate at which the distance between Matthew and Jessica is changing when x=14,y=24, Va = 3 m/s, and Vb = 3 m/s. df dt