Determine the number of moles of a real gas required to occupy $1.44 m ^{3}$ volume at its Boyle's temperature and 0.1 atm pressure. Take $R=0.082 L atm K ^{-1} mol ^{-1}$. Given : Vanderwaal constants 'a' and ' $b$ ' for the real gas are $1.2 atm L ^{2} mol ^{-2}$ and $0.05 L mol ^{-1}$ respectively.