here is the question

Completely Miscible Binary Liquids: Ideal Solution The vapour pressure for component A is 410mmHg at 70C, whereas component B is 720mmHg. A and B form an ideal solution. Knowing that the liquid solution contains 70% mole of A, i. Find the vapour pressure of the solution ii. Find the pressure at which the mixture will completely vaporise at 70C iii. Find the composition of the vapour equilibrium with the mixture iv. Find the composition of the last drop of liquid before vaporisation becomes complete