P marks (b) A chemist recorded the microwave spectra of two isotopically pure carbon monoxide ("C160 and 2C160) samples. Unfortunately, due to an error when naming the files, the chemist was unsure of which spectrum belonged to which sample. In order to identify the correct microwave spectrum for C10 and 'C' they compared the observed lines for file A and file B. Spectral Line No. 1 2 3 4 Observed Wavenumber (cm) of file A 3.84236 7.68472 11.52708 15,36944 Observed Wavenumber (cm) of file B 3.67338 7.34676 11.02014 14.69352 Assuming that carbon monoxide behaves as a rigid rotator, identify the gas in file A and file B. You should clearly explain your rationale in coming to the decision