Now, we will model the man on the left as a truss. To be sure the trusses are statically determinate, we treat the counterweights (the bricks and attached ropes) as external forces that are not part of the truss. Model A Model B FL Figure 4: The center and right images show two truss designs that might be used to model the man's torso, his arms, and the broomsticks. The supports (pinned and/or rolling) are not shown in the models. Assume the white and black arrow forces point straight down. 2. According to the method of joints, how many equations do you have for... a. [2 pts] the Model A truss (center image in Figure 4)? Explain. b. [2 pts] the Model B truss (right image in Figure 4)? Explain. 3. To balance the number of equations and number of unknowns, how many supports would you need for each truss? Recall that pinned supports have two unknowns and rolling supports have only one unknown. a. [2 pts] for the Model A truss b. [2 pts] for the Model B truss 4. Would you be able to use the Method of Joints to solve for forces in... a. [4 pts] the Model A truss? Explain. b. [4 pts] the Model B truss? Explain.