A 6-m long sign post is loaded by a horizontal force of P = 13.5 kN. The rectangular structural tube is 200 mm wide and 150 mm deep. The wall thickness of the tube is 10 mm on each of the four sides. Compute the following: 1. Shear stress at the section A-A of the post at point H. (10 pts) 2. Maximum shear stress at the section A-A of the post. (10 pts) 3. Draw the shear stress distribution over the cross-section. (10 pts) P 200 mm 5 m 6 m <I A A 10 mm 10 mm H 150 mm 1 m Cross-section at A - A 200 mm