Find the maximum and minimum values of f(, y) = 3 + y on the ellipse x + 9 = 1 maximum value: minimum value:Use Lagrange multipliers to find the point (a, b) on the graph of y = e's, where the value ab is as small as possible. P =Use Lagrange multipliers to find the minimum value of the function f(@, y) = x + y subject to the constraint xy = 5. Minimum:Find the minimum and maximum values of the function f(x, y, >) = 3x + 2y + 4z subject to the constraint x + 2y + 622 = 4. fmar = fmin =Find the maximum value of f(x, y) = x y for x, y > 0 on the unit circle a* + y- = 1. fmar =