4. Write the parametric and symmetric equations for each vector equation. a. [x, y, z] = [3, 0, -1] + t[6, -9, 1] b. [x, y, z] = [11, 2, 0] + t[3, 8, 2] 5. Consider a plane with direction vectors [9, 4, 6] and [-8, 2, -7]. The plan passe through the point (10, - 1, 5). Find the vector form and the parametric form of the equation of the plane