Extracted text: Problem II. The structure shown below consists of an - 2a - 2a arch AB and an elastic column BC. (Note: Joints where members meet can be treated as pin. Refer to the given table for the value of a). a. Calculate the weight, W, that causes the column to buckle. A b. Determine the support reactions corresponding to the weight from the previous question. 2a В GIVEN a (in m) За 2.659 W section cross 200 section dimesions are in mm 400