For the assembly and loading of Prob, 1.7, determine (a) the average ihearing stress in the pin at B,(b) the average bearing stress at B in member BD, (c) the average bearing stress at B in member ABC, knowing that this member has a 10×50-mm uniform rectangular cross section. PROBLEM 1.7 Each of the four vertical links has an 8×36−mm uniform rectangular cross section and each of the four pins has a 16−mm diameter. Determine the maximum value of the average normal stress in the links connecting (a) points B and D,(b) points C and E.