2) )8 (po ) a K9=K6Kx 7 A a D d G g H h f P f P f P f P f K ( ) ( ) ( ) ( )      = A A a D D d G G g H H h P P P P P P P P ( ) ( ) ( ) ( )         = d D a A h H g G A a D d G g H h P P P P P P P P         ( ) ( ) ( ) ( ) =    Kf = KP K