The rear seats do not weigh that much, not more than 15lbs. MAX.
But it is worth a try, just pull those tabs either up or out or both. After you have removed the rear lower seat it just a matter of removing a few bolts at the base at the rear seat backs. Do not forget to lift the tab on top of the seat back, the one used to lower the rear seats. On hatchbacks the seat backing(carpet) must be removed to to remove the seat.