Figure 6 shows a tall open-topped standpipe which has an inside diameter of 2.25m and a wall thickness of 8 mm. The standpipe contains water, which has a density of 1,000 kg/m3 . 1. What height h of water will produce a circumferential stress of 16 MPa in the wall of the standpipe? 2. What is the axial stress in the wall of the standpipe due to the water pressure?