Robert is growing plants in 5 plant boxes. Part A: Robert had 28 pounds of dirt to fill the plant boxes. He put the same amount of dirt in each of the 5 plant boxes so that no dirt was left. The number of pounds of dirt he used in each plant box is between what two consecutive whole numbers? Part B: Robert had 4 seed packets that each contained the same number of seeds. He combined all the seeds together and then planted the same number of seeds in each of the 5 plant boxes so that no seeds were left. What fraction of the seeds in 1 packet went into each box?