The following table lists selected mass-spectral data for three isomeric alcohols with the formula C5H12O. On the basis of the peak positions and intensities, suggest structures for each of the three isomers. A dash means that the peak is very weak or absent entirely.

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Relative Peak Intensities Isomer A Isomer B Isomer C 88M" 87 (M 1) 73 (M -15) 70 (M -18) 59 (M 29) 55 (M 15 18) 45 (M 43) 42 (M 18 28) 38 100 60 17 100 10 100