Draw Mohr Circle and answer the following:

Consider a point in as stmuctural member that is subjectod to plane stress. Normal and slocar stresses acting on fhorizoutal and yertical planes at the point are shown.

$($a$)$ Defermine ofne principal stresses and the moaxiowom in$-$plane shear stress acting at the point.

$($c$)$ Decermine the altrolute maxiuum shear stress at the point.