The figure shows a lower leg being exercised. It has a 49-N weight attached to the foot and is extended at an angle with respect to the vertical. Consider a rotational axis at the knee, as indicated. (a) When = 73°, find the magnitude of the torque that the weight creates. (b) At what angle does the magnitude of the torque have a value of 10 N-m? (a) Number Axis 0.55 m Units (b) Number i Units 49 N