Suppose the same method is called twice in the following snippet: obj1.drive(obj2) obj3.drive (obj4) What do you infer about the types involved? Note: if you've looked ahead and know what "inheritance" is, assume there is no explicit inheritance by any of the classes involved (if you don't know what inheritance is, ignore this note). obj2 and obj4 are different types obj1 and obj3 are different types obj1 and obj2 are different types obj2 and obj4 have the same type obj1 and obj 3 have the same type