Question 1 (10 points)

Given the following code, which method will cause a compile error:

abstract class A {

public int do_stuff1() {

return 3;

}

public abstract int do_stuff2() {};

public void do_stuff3() {

return;

}

public abstract int do_stuff4();

}

Question 1 options:

	do_stuff1()
	do_stuff2()
	do_stuff3()
	do_stuff4()
	More than one method will cause a compile error.