Question: In Exercises 25 through 30, find all interior and boundary critical points and determine the largest and smallest values of the function f(x, y) over

In Exercises 25 through 30, find all interior and boundary critical points and determine the largest and smallest values of the function f(x, y) over the given closed, bounded region R.

f(x, y) = x3 − 4xy + 4x + y2 on the square region R with vertices (1, 2), (4, 2), (1, 5), and (4, 5).

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