Look at the following code: line1: public class a line2: { line3: public a() {} line4: public void method1() {} line5: } line6: public class b extends a line7: { line8: public b() {} line9: public void method1() {} line10: } line11: public class c extends b line12: { line13: public c() {} line14: public void method1() {} line15: } which method1 will be executed as a result of the following statements? a item1 = new c(); item1.method1();