As shown in the figure, a force is applied to one end of an Lshape frame that is fixed to the floor. a. Calculate the magnitude of the torque about point A clue to the force F. b. Calculate the magnitude of the torque about point B clue to the force F. c. Calculate the magnitude of the torque about point Cdue to the force F. d. Calculate the magnitude of the torque about point D due to the force F