Compound A (C₇H₁₄O) burned with a yellow, nonsooty flame and did not decolorize a bromine–methylene chloride solution. It did give a positive 2,4-dinitrophenylhydrazine test, but a negative Tollens test. Treatment of the compound with lithium aluminum hydride followed by neutralization with acid, produced compound B, which gave a positive Lucas test in about 5 min. Compound B also gave a positive ceric nitrate test. The ¹ H NMR spectrum for compound A gave the following data: 1.02 ppm          9H, singlet

2.11 ppm          3H, singlet

2.31 ppm          2H, singlet

Give suitable structures for compounds A and B.