n-heptane and toluene form an ideal solution mixture. At \(373 \mathrm{~K}\), their vapour pressures are \(106 \mathrm{kPa}\) and \(74 \mathrm{kPa}\) respectively. Determine the composition of the liquid and vapour in equilibrium at \(373 \mathrm{~K}\) and \(101.3 \mathrm{kPa}\).