We've lived for 7 years in the house we plan to sell, BUT in the last 5 years we only lived 1.3 years (as primary residence)....our son then lived in it for 2 years....and we rented it the last year. Do we qualify for at last a partial (or proportional) capital gains exclusion, or must one have the full 2 years (out of the last 5) to qualify?