Repeat parts $($a$),($b$),$ and $($c$)$ of Problem $2$ for the stress state shown in Figure $3.$

a$.$ Calculate normal and shear stresses acting on plane AA$^(\text{'})$

$(10$ pts$)$

b$.$ Show the stresses calculated in part $($a$)$ on the plane AA$^(\text{'})$

$(5$ pts$)$

c$.$ Determine the major principal planes and calculate the major principal stresses acting

on them

$(10$ pts$)$ Figure $3$ Stress state for use in Problem $3$