1.8 Each of the four vertical links has an 8 x 36- mm uniform rectangular cross section and each of the four pins has a 16- mm diameter. 1.23 For the assembly and loading of Prob. 1.8, determine (a) the average shearing stress in the pin at B, (b) the average bearing stress at B in link BD, (c) the average bearing stress at B in member ABC, knowing that this member has a 10 x 50-mm uniform rectangular cross section.