Contoh Soal 3 B 2 a B D A 3 K a 2 2 1 . . 3 2 2 3 2 = = = : = . 3 2 2 2 1 2 2 2 2 3 3 3 3 2 1 3 = = = a 2. = . = . = 2 3 2 2 2 2 2 4