3. The rectangular wood panel is formed by gluing together two boards along the 30 degree seam as shown in the figure. Determine the largest axial force P that can be carried safely by the panel if the working stress for the wood is 8 N/mm2, and the normal and shear stress in the glue are limited to 5 N/mm2 and 3 N/mm2 respectively. (Hint: cos30。= 0.866, sin30。=0.50, sin60。=0.866, cos60。=0.50) (25％)