Solve the following problems
(a) Is the point on the line?
(b) Does the pointlie in the plane?
(a) a vector of length 1 which points in the same direction,
(b) a vector of length 5 which lies in the opposite direction:
Show that the vectors (1/3, -2/3, -2/3) and (2/3, -1/3, 2/3) are orthogonal and derive the general form of the vector that is orthogonal to both.