7 The line \(l_{1}\) passes through the points \(A(-3,1,4)\) and \(B(-1,5,9)\). The line \(l_{2}\) passes through the points \(C(-2,6,5)\) and \(D(-1,7,5)\).
(i) Find the shortest distance between the lines \(l_{1}\) and \(l_{2}\).

(ii) Find the acute angle between the line \(l_{2}\) and the plane containing \(A, B\) and \(D\).