What are weight fractions each?

You are given 4 different samples of monodisperse polystyrene. The first sample (1) has a molecular weight of 1,000g/mol, the second (2) is 10,000g/mol, the third (3) is 100,000g/mol, and the fourth (4) 1,000,000g/mol. Consider a 5g mixture comprised of 2g of sample (1), 0.5g of sample (2), 2 g of sample (3), and 0.5g of sample (4)