Question: 5 . Based on the class relationships above, indicate the valid or invalid declarations. a . Animal a = new Animal ( ) ; b

5. Based on the class relationships above, indicate the valid or invalid declarations.
a. Animal a = new Animal();
b. Animal b = new Cow();
c. Animal c = new Chicken();
d. Cow d = new Animal();
e. Cow e = new Chicken();
f. Chicken f = new Animal();
g. Chicken g = new Cow();

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