Hand written solution required

1. (20 pt) The steel plate has the cross-section as shown in the figure. (diameter of the hole is 1.0 m) a) Locate the centroid of y only of area I (area ADCA) to the coordinate system given. b) Use results from a), calculate the centroid of y only for the whole steel plate (area ADCBA with a circular hole) according to the coordinate system given. a) b) whole shaded area y = 2x 2 m -2m c) Choose the right answer: i. ( ) The parallel-axis theorem for a moment of inertia of area (Mol) is applied between A) an axis passing through its centroid and any corresponding parallel axis B) any two parallel axis C) two horizontal axes only D) any two axis E) none of above ii. () Which unit can be used for the moment of inertia of an area (Mol)? A) kg/m B) Ib/ft C) in' D) mm* E) none of above