The mass % natural abundance of the isotopes H and D are 99.985 and 0.015 respectively. The mass % natural abundance of the isotopes 16O, 17O and 18O are 99.759, 0.037 and 0.204 respectively. In a mass spectrometry experiment on naturally occurring water, at what m/z values would you expect to observe the three most abundant peaks for the molecular ions and what would you expect to be their relative abundances.