Three forces act on a circular disc at points A, B, and C.  The magnitudes of the forces are F_A = 5.7 N, F_B = 8.3 N, and F_C = 4.1 N.  The forces act at distances r_A = 0.50 m, r_B = 0.25 m, and r_C = 0.10 m from the center of the disc.  Angles are given on the diagram below.  Determine a) the net torque acting about the center of the disc, and b) whether the angular acceleration is clockwise or counterclockwise. Solve the problem using the same method presented in Calculating Net Torque. Show your work.  Enter your answers in the corresponding WebAssign assessment.