$7.$ Vertical force $\backslash ($ P $\backslash )$ of magnitude of $\backslash (250[\backslash$mathrm$\{$~N$\}]\backslash )$ is applied to the crank at Point A$.$ The diameter of the shaft $\backslash ($ B D E $\backslash )$ is $\backslash (13[\backslash$mathrm$\{$~mm$\}]\backslash ).$ Point $\backslash ($ H $\backslash )$ on the top of shaft $\backslash ($ B D E$,50[\backslash$mathrm$\{$~mm$\}\backslash )]$ to the right of the center of support D$.$ Note that the crank is inclined $60$ degrees from vertical

a$.$ What is the normal stress due to bending at Point H $[$MPa$]?$

b$.$ What is the torsional shear stress at Point H $[$MPa$]$