Extracted text: Fig. 814. (a) For the sbaded area of Fig. 414, compute I. (b) Determine the moment of incrtia about a centroidal axis parallel to the zaxis. (c) Determine I, and the polar moment of inertia for an axis through O. Ans. (a) 688 in.; (b) 164 in.*; (c) 928.6 in.“, 1616.6 in. B 6*- 8"- Fig. 414. Problem 814.