Extracted text: The double angle shown in the figure carries a tensile force P. Given: Allowable shearing stress of bolt = 150 MPa Allowable tensile stress of bolt = 195 MPa Bolt diameter, D; = D2 = 25 mm a = 4, b = 3 1. Find the minimum safe load P (kN) based on tensile and shearing strength of bolt D2. 2. Find the P (kN) based on shear strength of the bolt D1. 3. If P = 400 kN, what is the required diameter of bolt D2? 4 D. 3D,