A 6.25 kg particle with velocity = (3.96 m/s) - (8.87 m/s) is at x = 1.60 m, y = 5.36 m. It is pulled by a 7.65 N force in the negative x direction. About the origin, what are (a) the particle's angular momentum, (b) the torque acting on the particle, and (c) the rate at which the angular momentum is changing?