04 2 3 1 3. (25 pts.) For the composite shape sown to the right, calculate: The y-coordinate of the centroid (y). (15) b. The second moment of inertia about the centroidal x axis (I.) passing through the y-coordinate of the centroid calculated in part a. Hint: You will need to use the parallel axis theorem. (10) 3 ft 7 ft 3 ft 9 ft