a. Show how the following BST will look like after adding value 62 to the tree, and then deleting the node with value 64, using the predecessor approach. Original BST Resulting BST 55 40 65 21 61 90 (7 53)( 57)(54 ( 80 28 47 b. Show how the following BST will look like after adding value 82 to the tree, and then deleting the node with value 40, using the successor approach. Original BST Resulting BST 55 40 65 21 50 61 90 28 47 53 )( 57)(64 80