Arectangular board is 1.4 m by 6 m. how far from the center of the board should the foci be located in order to cut the largest elliptical tabletop from the board? round your answer to the nearest

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.