Link $AB,$ of width $b=2in.$ and thickness $t=\frac{1}{4}in.,$ is used to support the end of a horizontal beam. Knowing that the average normal stress in the link is $-20$ ksi and that the average shearing stress in each of the two pins is $12$ ksi determine

a$)$ Consider link AB$,$ the bearing stress on the link at Pin$-$A is $\_\_\_\_\_\_$ psi?

b$)$ Consider Pin$-$A$,$ the bearing stress on the pin is $\_\_\_\_\_\_$ psi?