\(ABCD\) is a rhombus. The diagonals \(AC\) and \(BD\) intersect at \(O\). If \(AC =\) 8\ cm\) and  \(BD = 12\ cm\).
 
(i) find all sides of the rhombus \(=\) i\(\ cm\)
 
(ii) find its perimeter \(=\) i\(\ cm\)