Problem $3(15+15)$ : For each of the plane stress states listed below, draw a Mohr's circle diagram

properly labeled, find the principal normal and shear stresses, and determine the principal angles. Draw

stress elements.

$($a$){}_x=36k,{}_y=25k,{}_{xy}=7kccw$

$($b$){}_x=16$MPa,${}_y=-13$MPa,${}_{xy}=10$MPacw

Problem $4(10+10)$ : Repeat problem $3$ by using the transformation equations only.

Could you just answer the secound part: Repeat problem $3$ by using thr transformation equations only.