Can you help me with these three questions. Thank you.

{13 points} Determine the center of mass of the region in the first quadrant bounded by y = 8 x2 if the density function is proportional to the height above the x-axis. [18 points} Determine the center of mass of the triangular region with vertices (0,0), (5,0) and (0,12) if the density function is proportional to the distance from the y-axis and length is measured in inches. [18 points} Determine the center of mass of the region inside I" = 6 + 3 sin 9 if the density function is proportional to the distance from the pole