BI TP TUN 5Cu 1. Da vo ti m bn (nhm bn) chn thc hin bi tp ln Phn tch v ch ra tnh a hnh ca h thng. Vit m ngun bng ngn ng Java minh ha.Cu 2. Cho on m Java saupublic class Pair { public T first; public U second; public Pair (T x, U y) { first = x; second = y; } public Pair () { first = null; second = null; }}on m no sau y l ng? Gii thch ngn gn la chn ca bn.A. Pair pair = new Pair();B. Pair pair = new Pair();C. Pair pair = new Pair(0, new Circle());D. Pair pair = new Pair(new Circle());