2b. (20%) The uniform sign shown in the right figure has a mass of 650 kg and is supported on the fixed column. The xepected maximum uniform wind loading perpendicular to the sign board will be approximately 900 Pa. Determine the internal loading or reaction force at point B. Choose only either 2a or 2b to solve for solution. 6 m 650 kg 2.5 m 4 m A 4 m B