a) Find the directional derivative of the function at the given points in the direction of vector v. h(x, y, z) = cos(xy) + ey² + Inyz, Po(1,0, ¹/2), v = i + 2j+2k. b) Find the local extreme values of f(x,y) = x² + 3xy + 3y² - 6x + 3y - 6. Solution # 5 (to be typed here by the student)

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