A', 'B' and 'C' plan to enter into a jewellery shop and commit theft at the shop. They collect the implements of housebreaking and go to the jewellery shop to execute their plan. On reaching there, they find a police patrol van stationed outside the shop and hence return. Their act amounts to:

interface Base{ boolean m1 (); byte m2(short s);}

1. interface Base2 implements Base {}2. abstract class Class2 extends Base { public boolean m1(){ return true; }}3. abstract class Class2 implements Base {}4. abstract class Class2 implements Base { public boolean m1(){ return (7 > 4); }}5. abstract class Class2 implements Base { protected boolean m1(){ return (5 > 7) }}