$($a$)$ Draw the Mohr's circle for hydrostatic stress $($i$.$e$.,$ where all the principal stresses are

equal$).$ Please make sure to draw and label the axes and indicate the principal stresses and

the maximum shear stress for the system.

$($b$)$ Draw the Mohr's circle for pure tension. Please make sure to draw and label the axes

and indicate the principal stresses and the maximum shear stress for the system.

$($c$)$ Draw the Mohr's circle for pure torsion. Please make sure to draw and label the axes

and indicate the principal stresses and the maximum shear stress for the system.

$($d$)$ Draw the Mohr's circle for biaxial tension$/$compression; with equal tensile and

compressive stresses. Please make sure to draw and label the axes and indicate the

principal stresses and the maximum shear stress for the system.