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

Knowing that θ = 40° and P = 9 kN, determine (a) the smallest allowable diameter of the pin at B if the average shearing stress in the pin is to not 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 un 750 mm 50 mn 12 inm Fig. P8. 23