At ${20}^{\circ }C$, vapour pressure of ${\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)$ is recorded as 28.57m bar. The initial and final vapour pressure of ${\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)$, if volume of container containing ${\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)$ is increased from 5 litre to 10 litre, are :