Q$.$ #$1(15$ points$)$

a$)$ The shear and moment diagrams for the given beam are shown. Use the maximum values and answer the following questions:

b$)$ Calculate maximum compressive and tensile normal stresses due to bending. $(5$ points$)$

c$)$ Calculate maximum shear stress due to shear force. $(5$ points$)$

d$)$ Calculate shear and normal stress at point $A$ by using maximum moment and shear values $($Note that: The point $A$ in the web$).(5$ points$)$