For each compound in each of the following groups of isomers, indicate the number of signals in the ¹H NMR spectrum, the approximate chemical shift of each signal, and the integration ratios for the signals. Ignore spin – spin splitting. Indicate whether all the isomers in each group can be distinguished from one another by these three pieces of information alone.

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CH3 CH3 CH3 a) CH;CCH,CH3, BrCH,CHCH,CH3,. CH;CHCH,CH,Br Br CH,CI CH3 (b) CICH,CH,CH,CH,OH, CH,CHCH,OH, CH;CCH,OH ČI CH; CH; CH3 CH3 CH3 CH3 c) CICH,Č- -СНCH, CICH,CH- -CCH3, CICH,Ċ CHCH3, CICH,CHCCH, Br Br CH3 Br Br CH3