the undissolved material let it air-dry and weighed it

1.A student stirred 2.05 g of a substance in 100 mL acetonitrile for 30 min at room temperature then filtered the undissolved material let it air-dry and weighed it. It amounted to 1.10 g.a)To two significant digits what is the solubility (in g/L) of this substance in acetonitrile?b) The student similarly measured the solubility in hexane which was found to be 0.55 g/L. To two significant digits what is the distribution constant for this substance in this solvent pair?