Neon has three naturally occurring isotopes: 20Ne (19.992amu) with 90.48% abundance, 22 Ne(21.991amu) with 9.25% abundance, and a third isotope with 0.27% abundance. Calculate the mass of the third isotope of neon in (a) amus and (b) in relation to the mass of an atom of 12C (i.e. the mass of the neon isotope = (some factor)*(the mass of an atom of 12C)).