Find the absolute maximum and minimum values of f on the set D.   f(x, y) = 4x + 6y − x2 − y2 + 6,   D = {(x, y) | 0 ≤ x ≤ 4,  0 ≤ y ≤ 5}

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A: The solution is given below in the next step:

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Q: Picture attached. Thanks in advance!

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