Dilute Solution

For a dilute solution containing 2.5 g of a non-volatile non-electrolyte solute in 100 g of water, the elevation in boiling point at 1 atm pressure is 2°C. Assuming concentration of solute is much lower than the1 concentration of solvent, the vapour pressure (mm of Hg) of the solution is (take Kb = 0.76 Kkg mol $^{-1})$