alhamdulillah.........we have d0ne pbl 3......at the beginning, when we got the question,there are certain question that we don't understand which are question 1 and 2....we have try for our best to answered that question....thanks to my gr0up, wany n dayah that give full c0mmitment during this pbl.....and gud luck t0 all my fren f0r ur final exam;) d0 ur best~~