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Question 1: Let's call the node as a that requires re-balancing. Consider the two cases given below:

1. An insertion into left subtree of the left child of a
2. An insertion into right subtree of the right child of a.

Which of the following statement is correct about these two cases.

1. The insertion occurs outside (i.e., left-left or right-right) in cases 1 and 2. single rotation can fix the balance in these two cases.
2. The insertion occurs inside ((i.e., left-left or right-right) in cases 1 and 2. single rotation cannot fix the balance in these two cases