3. 10 pts. Propose structures for compounds that fit the following data:
a. C5H10O
$\delta = 0.95$ ppm (6H, doublet)
$\delta = 2.10$ ppm (3H, singlet)
$\delta = 2.43$ ppm (1H, multiplet)
b. C5H10O
$\delta = 0.95$ ppm (3H, triplet)
$\delta = 1.3$ ppm (2H, sextet)
$\delta = 1.6$ ppm (2H, pentet)
$\delta = 2.38$ ppm (2H, triplet)
$\delta = 9.72$ ppm (1H, singlet)