In Problems 1-3, find the mass m and center of mass (x, y) of the lamina bounded

Question:

In Problems 1-3, find the mass m and center of mass (x̅, y̅) of the lamina bounded by the given curves and with the indicated density
1. x = 0, x = 4, y = 0, y = 3; ((x, y) = y + 1
2. y = 0, y = (4 - x2; ((x, y) = y
3. y = 0, y = sin x, 0 ( x ( (; ((x, y) = y