Question: abstract class A { public int do_stuff1() { return 3; } public abstract int do_stuff2() {}; public void do_stuff3() { return; } public abstract int

abstract class A {
public int do_stuff1() {
return 3;
}
public abstract int do_stuff2() {};
public void do_stuff3() {
return;
}
public abstract int do_stuff4();
}
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(); ] do_stuff10 do_stuff2() do_stuff3() do_stuff4() More than one method will cause a compile error
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