The points \(A(8, 4)\), \(B(20,4)\), \(C(8,-24)\) and \(D(20,-24)\) in order are the vertices of a rectangle. Calculate the side values of the rectangle using the distance formula.
 
The sides of the rectangle are:
 
\(AB =\) i.
 
\(BC =\) i.
 
\(CD =\) i.
 
\(AD =\) i.