Reaction of a vicinal diol with acetone

I have the first part correct; however, I can't seem to understand what the 2nd part's answer is. I realize the water leaves, but then what? 


[![enter image description here](https://i.stack.imgur.com/pBfNV.png)](https://i.stack.imgur.com/pBfNV.png)




There was this guy who recently [protected a ketone](https://chemistry.stackexchange.com/questions/9166/challenging-reaction-question) in the presence of an ester. You might have heard about him ;)


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