$Isobutylene$ $\xrightarrow[(2) H_2O]{(1) O_3}$ $Product$

Identify the major product $A$ and major product $B$ in the following set of reactions:
$CH_3-CH=CH_2 \xrightarrow{H_2O, H^+} \text{Major product } A$
$CH_3-CH=CH_2 \xrightarrow{(BH_3)_2, H_2O_2, OH^-} \text{Major product } B$

Explain the hydrolysis of alkenes.

For which of the following reactions is Markovnikov's rule most applicable?

Which is the suitable reagent for the above reaction?

Predict the major product $A$ for the following reaction:
$2\text{-methylbuta-1,3-diene} + HBr (1 \text{ eq.}) \xrightarrow{-80^{\circ}C (1,2\text{-addition})} A$