10 The points \(A ( 5 , - 4,6 )\) and \(B ( 6 , - 6,8 )\) lie on the line \(L\). The point \(C\) is \(( 15 , - 5,9 )\).
10
- \(D\) is the point on \(L\) that is closest to \(C\).
Find the coordinates of \(D\).
10 - Hence find, in exact form, the shortest distance from \(C\) to \(L\).