Question: Find the maximum and minimum values of f subject to the given constraints. Use a computer algebra system to solve the system of equations that

Find the maximum and minimum values of f subject to the given constraints. Use a computer algebra system to solve the system of equations that arises in using Lagrange multipliers.
(If your CAS finds only one solution, you may need to use additional commands.)

f (x, y, z) = yex-z; 9x2 + 4y2 + 36z2 = 36, xy + yz = 1

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