Find the normal line for the level surface f(x,y,z) = 3x3 + cos (2y) + ln (2z) = c at the point (2,8,2). a. r(t) = <36.000,  0.576,  0.500> + t <2,8,2> b. r(t) = <2,8,2> + t <36.000,  0.576,  0.500> c. r(t) = <2,8,2> - t <36.000,  0.576,  0.500> d. r(t) = <36.000,  0.576,  0.500> - t <2,8,2>

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