For $P=13\mathrm{.}5$MPa, determine the value of ${}_{xy}$ for which the in$-$plane shearing stress parallel to the weld is zero and the corresponding principal stresses. Solve the problem using Mohr's circle. $($Round the final answers to two decimal places.$)$

The value of $T_{xy}$ is $$ MPa $(+$ CCW on the $x^{\text{'}}-$face$).$

The maximum principal stress is $$ MPa and the minimum principal stress is $$ MPa $(+$ tensile; $-$ compressive$).$