(i) Predict the main product obtained when the molecule below reacts with DIBAl-H. 
(ii) Based on your answer, is there a need to convert the ester to another ester to accomplish what DIBAl-H is intended to do?

Yes, converting the ester to another ester is needed in this instance. 

No, converting the ester to another ester is not needed in this instance. 

Yes, converting the ester to another ester is needed in this instance. 

No, converting the ester to another ester is not needed in this instance.