WHOSE IS IT?

THE SMITHS, MARY AND DAVID, ARE GOING ON HOLIDAY WITH THEIR CHILDREN ,SUE AND PETER. THEY HAVE FOUR NEW SUITCASES ,A RED ONE, A BLUE ONE TWO BROWN ONES FOR THE CHILDREN.THEY MUST TAKE THEM FROM THE BUS.FILL IN THE GAPS WITH MINE / YOURS/ HIS / HERS / THEIRS / OURS