Reactions of ketones and aldehydes Our topic was about ketones and aldehydes (carbonyl group) including hemiketals and hemiacetals and he asked us to do a homework. I cannot find an answer to this one.Please explain me the reaction and the product formed.

PS: The figure at bottom is my best effort to do this question.
But.....6 member lactones are super stable so I wouldn't be surprised if only 1 ring opened/ some recyclized