a.
H
HICH
CH2
C
Use VSEPR to predict bond angles at the marked atom. The angle is: 120 degrees.
The expected hybridization at the marked atom is sp2
H3C
Z:
b.
OH
H
Use VSEPR to predict bond angles at the marked atom. The angle is: 120 ✓ degrees.
The expected hybridization at the marked atom is sp2 ✓