Numerical problem $1\mathrm{.}1$: The pipe shown in the figure has the same circular cross$-$section along the entire length. External force is $200$ kN and it acts in y $-$direction on the xy $-$plane. Shear failure stress is $80$ MPa $.$ The factor of safety is $2.$

Note: This is not a bending problem, but a simple shear problem $($at point A$).$

Write the final solution in the box for this question.

$($a$)$ What is the absolute value of the force reaction at the support $A?$

kN

$($b$)$ What is the allowable shear stress? in MPa $.$

Please answer all parts with solution