Find the center of mass of each of the following: (a) A thin wire bent into the form of a three-sided, block-shaped "u" with each segment of equal length b (b) A quadrant of a uniform circular lamina of radius b (e) The area bounded by parabola y =rib and the line y =b (d) The volume boumded by paraboloid of revolution z = (r*+y)/b and the plane z=b (e) A solid uniform right circular cone of height b​