Find the center of mass of the lamina that occupies the region D = {(x, y)|1 ≤ x ≤ 3, 1 ≤ y ≤ 4}, and the density function p(x, y) = ky²
a. (83/18,79/27)
b. (0,86/25)
c. (2,17/14)
d. (2,85/28)