Chemistry Help????

Question

1d) The number of grams of water required to dissolve a mixture containing 18 g KNO3 and 4 grams CUSO4 * 5 H2O, assuming that the solubility of one substance is not affected by the presence of another. Find the number of grams of H2O??

2) TO the solution in Problem 1d at 100 degrees Celsius, an additional 12 grams of water are added, and the solution is cooled to 0 degrees Celsius.

a) How much KNO3 remains in solution?

b) How much KNO3 crystallizes out?

c) How much CuSO4 * 5 H2O crystallizes out?

d) What percentage of the KNO3 remains in the sample recovered?