Diastereoselectivity of the Pauson Khand Reaction

I hope someone may help me. I don‘t know how to determine the diastereoselectivity of the product of the Pauson Khand reaction in generally. 
In the following I’ve got 3 practice examples,however in the third one I’ ve got no solution. I know the product and the regioselectivity. 
[![enter image description here](https://i.stack.imgur.com/owjGD.jpg)](https://i.stack.imgur.com/owjGD.jpg)


