Knowing that = 40 and P = 9kN, determine (a) the smallest allowable diameter of the pin at B if the average shearing stress

Knowing that θ = 40 and P = 9kN, determine (a) the smallest allowable diameter of the pin at B if the average shearing stress in the pin is not to exceed 120 MPa, (b) the corresponding average bearing stress in member AB at B, (c) the corresponding average bearing stress in each of the support brackets at B.

16 mm 750 mn 750 mm 50 mm- 12 mm Fig. P8.23 and P8.24