1. Convert the line to symmetric form. L: [x, y, z] = [-1,3, -1] + t[2, -5, -2] 2. Find two non collinear vectors on the plane 2x - y - z + 2 = 0 3. Find the scalar form of a plane that passes through P(2, 1, 3) with normal n = [2, 1, 3]. 4. Find the scalar form of the line through P(2, 1) with direction vector d = [-1, 3]