Show each red-black tree that results after successively inserting the keys 4 7 12 15 3 5 14 18 into an initially empty red-black tree. At the steps were a red-black tree rule is violated, explain how it is corrected

Now delete these keys in this order and show each resultant red-black tree 18 15 7 14. At the steps were a red-black tree rule is violated, explain how it is corrected