The mass spectrum of 1 ethyl 1 methylcyclohexane with a molecular weight of 126 shows many fragments, with two very large abundances. One appears at m/z = 111 and the other appears at m/z = 97. What can be inferred from this mass spectrum?
1) The compound has a molecular ion peak at m/z = 126
2) The compound has a fragment with a mass of 111
3) The compound has a fragment with a mass of 97
4) The compound has a fragment with a mass of 126