4. Using the method of sections (or cuts) and the equations of equilibrium, solve for the inter- nal shear force (V) and bending moment (M) equations for the following loading scenarios. DO NOT use the graphical method when solving the problem. No points will be earned for using the graphical method. Draw the shear force diagram and bending moment diagram, for each beam. Be sure your diagrams are appropriately labeled. Hint: In figure (b) below, the horizontal green arrows represent a distributed force per unit length that has a constant amplitude po. (a) (b) fx = Po (N/m) (c) W x -L/2 P L L