How would you distinguish among the compounds within each of the following sets using their NMR spectra?

Question:

How would you distinguish among the compounds within each of the following sets using their NMR spectra? Explain carefully and explicitly what features of the NMR spectrum you would use.
(a) tran.s-3-hexene and 1-hexene
(b) tert-butyl methyl ether and isopropyl methyl ether