4. AT-shaped cross-sectional beam is loaded as shown in the figure. Determine the following: a. Sketch the internal shear force and bending moment diagrams for the beam. b. Calculate the

maximum magnitude of the bending stress. Indicate where this occurs on the cross-section and along the length of the beam. cross-section and along the length of the beam.c. Calculate the transverse shearing stress at the centroid of the cross-section using the maximum magnitude of the transverse shear force.