A stress element is given on the figure, at right.

$($a$)$ Draw Mohr's circle for this element.

$($b$)$ Find ${}_1,{}_2,{}_{\text{m}\text{a}\text{x}},{}_{\text{m}\text{i}\text{n}}.$

$($c$)$ Draw a stress element with directions indicating principal stresses, ${}_1$ and ${}_2.$

$($d$)$ Draw a stress element indicating direction of ${}_{\text{m}\text{a}\text{x}}.$