Determine the reaction forces and plot the bending moment and shear force diagrams for the beam shown below. (a) Use direct stiffness method (perform the matrix operations using the excel template shared on Canvas; upload also the excel file you used) (b) Use force method to verify the results in (a). Note: E = 29,000 ksi, /= 600 in. The values are constant from A to C. Moment release (hinge) 42 12 ft 10 k D 12 ft 2.4 klf B 12 ft