If we plot the points on the coordinate system we can see that for x, equal masses are occupying x = 1 through 4. with an equal density value. because they are all uniform we can intuit the moment to be the center of that distribution so Mx = 2.5. Looking at y we have two equal masses at y = 1 and another set of masses at y = 3. This means that we have a moment in between those distributions and our My = 2. The center of mass is the combination of the two, and it is at pt (2.5, 2). Because the masses considered are in general and also equal to each other.
