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Use Lagrange multipliers to solve the given optimization problem. Find the minimum value of x, y) = X2 + y2 subject to X + 2y = 15. f... = E Also nd the corresponding point (X, y). m=(S) {14.23 Points] DETAILS WAN EFMAC7 15.4.0131 . Solve the given optimization problem by using substitution. Find the maximum value of fix, 3!, z) = 3 x2 y2 22 subject to z = 7y. rm... = E Also find the corresponding point (X, y, z). (ma(S)