Suppose that database includes the facts and the knowledgebase includes the below rules initially. FACTS in DATABASE: Fact1: X Fact2: Y Fact3: Z Fact4: T RULES in KNOWLEDGE BASE: R1: X and B and F E R2: X or A B R3: X A R4: Z and TC R5: C and F K R6: Y and BL R7: L and X and A F 1) Write down the execution order of rules and facts added to the database to show that "E is true" using forward chaining (You have to write the whole content of the database after each cycle). 2) Write down the execution order of the rules to prove "E is true" using backward chaining (You have to write the content of the database after each rule is fired).