Consider the truss in Figure P4, which is supported by a rocker/roller at point A and a pin joint at point F. It is loaded with a vertical force P = 850 N and two angled forces Q = 750 N. The reaction forces at the supports are Ay = -10 N, F = 1200 N, and Fy = -40 N, with the directions shown in the figure. Here, d = 4.0 m. d A d B P Ay d d d d -Fx C D E F I 4 H 4 G 3 3 5 5 Q Figure P4. Truss loaded with various point forces. Fy a) Determine the number of zero-force members in the truss. [1 mark] Number of zero-force members in the truss = b) Determine the force in member CD. Use a positive value to indicate tension and a negative value to indicate compression. Provide your answer in N to 4 decimal places. Force in member CD [N] = c) Determine the force in member IH. Use a positive value to indicate tension and a negative value to indicate compression. Provide your answer in N to 4 decimal places. Force in member IH [N] = d) Determine the force in member ID. Use a positive value to indicate tension and a negative value to indicate compression. Provide your answer in N to 4 decimal places. I Force in member ID [N] = e) Determine the force in member DH. Use a positive value to indicate tension and a negative value to indicate compression. Provide your answer in N to 4 decimal places. Force in member DH [N] =