Find sets of parametric equations and symmetric equations of the line that passes through the two points (if possible). (For each line, write the direction numbers as integers.) (0, 0, 81), (18, 18, 0) (a) parametric equations (Enter your answer as a comma-separated list of equations in terms of x, y, z, and t.) (b) symmetric equations z- 9 %3D 18 18 81 O 2x = 2v = 9z - 81 OX - Y z - 81 -9 O 18x = 18y = 81z - 9 y - 9 z - 9 %3D 18 18 81

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