PROBLEM $3.$ A distributed load and a point load are acting on the cantilever $T$ sectioned beam as

shown in the figure. Point $A$ is at the intersection point of web and flange and located over the

flange and $B$ is located at the bottom of the web.

a$)$ Calculate and show stresses on differential elements at points A and $B.$

b$)$ Calculate the principal stresses at points A and B$.$ Show results on elements located at these

points.

c$)$ Calculate the maximum shear stress at points A and B$.$ Show results on elements located at

these points.