need help to solve, please see attached

Use the method of Lagrange multipliers to minimize the function subject to the given constraint. (Round your answers to three decimal places.) Minimize the function f(x, y) = x2 + 7y2 subject to the constraint x + y - 1 = 0. minimum of at (x, y) = Use the method of Lagrange multipliers to maximize the function subject to the given constraint. (Round your answers to three decimal places.) Maximize the function f(x, y) = 8x + 9y - 7x2 - 4y subject to the constraint x + 8y = 7. maximum of at (x, V) = ( Use the method of Lagrange multipliers to optimize the function subject to the given constraint. Find the maximum value of the function f(x, y, z) = x + 2y - 62 subject to the constraint z = 2x2 + y. (Round your answer to two decimal places