Match each function with the description of its f(x, y, z) = 0 level surface. e f(x, y, z) = -2² - y² – 2z² -e f(x, y, z) = x - 2² - y² -e f(x, y, z) = -x² + x² - y f(x, y, z) = x² + 2² a. saddle b. paraboloid (bullet shape) c. line (cylinder with 0 radius) d. single point

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