Direction: Study the following information and answer the following questions.

Mary is throwing small bags filled with stones into a lake. She observes that some bags float while others sink. Soon she realizes that whether a pouch floats or sinks depends on the total weight of the stones in a particular bag. She makes the following observations:

She throws four bags. All the stones are one among the following weights: 2, 4, 5, 12, 15, 28, 35, and 43 (in grams) and there is only one stone of each weight. No bag is empty. A bag can hold a maximum of 3 stones. Consider the first bag she threw as bag number one and so on. The following clues regarding the four bags are known.
The first bag floats, but if just one stone is swapped from the first bag with a certain stone from the third bag (which has the same number of stones) then, it would still not sink. The bag/s having more than two stones have the least weight. The second bag is the only bag having only one stone. The third bag sinks. 

Mary records the observation in the following manner but in random order: