Link AB$,$ of width b $=2$ in$.$ and thickness t $=1/4$ in$.,$ is used to support the end of a horizontal beam. The average normal stress in the link is $-23$ ksi and the average shearing stress in each of the two pins is $12$ ksi. NOTE: This is a multi$-$part question. Once an answer is submitted, you will be unable to return to this part. Determine the diameter d of the pins. The diameter d of the pins is in$.$