In Example 6, are the two lines r ( t ) = ( 4 + 2t, 3 - 4t, 6t) and R (t) = (2 - 3t, 7 + 6t, -6-9t) the same line, parallel but distinct lines, intersecting lines, or skew lines? They are parallel and the same line. They are parallel but distinct lines. O They are intersecting lines. O They are skew lines