b) Assume the following facts: a) Lucy chirps b) Lucy sings Rules: 1) If Lucy barks and Lucy chew bones - Then X is a dog 2) If Lucy chirps and Lucy sings - Then Lucy is a bird 3) If Lucy is a dog - Then Lucy is brown 4) If Lucy is a bird - Then Lucy is black a) Using forward chaining, explain which rules will fire to determine Lucy is black, (show your updated Facts memory) b) Using Backward chaining, explain which rules will fire to prove the goal: Lucy is black