6 The straight line \(l\) passes through the points with coordinates \(( - 5,3,6 )\) and \(( 5,8,1 )\). The plane \(p\) has equation \(2 x - y + 4 z = 9\).
- Find the coordinates of the point of intersection of \(l\) and \(p\).
- Find the acute angle between \(l\) and \(p\).