please solve

Now find the center of the 8 squares and take them as (x;, y;). N / W N / W N / W N W NIVN/UN / WN/ H N / UN/ UIN / WN/ P Next, approximate the volume by the sum Here, f(x, y) = *" y, and from the previous step we know that AA. = 1. 3 Substituting into the above sum, we have the following, ( Round your final answer to one decim 1 24 |1 + 3 + 9 + 27 + 25 - + 49 + 147