The fractions are in the ratio 4:2:6, so, since there are twice as many tulips as lilies, the lilies correspond to 2 in the ratios and the tulips to 4. Therefore, the tulips take up 4/12 of the garden (1/3); the lilies take up 2/12 (1/6); and the daffodils 6/12 (1/2).