Which process converts olefins into paraffins?

What is the product formed when $RCH = CH_2$ is treated with $B_2H_6$ followed by oxidation with alkaline $H_2O_2$?

The number of $sp^3$ hybridized carbon atoms in cyclohexene is

$CH_2=CH-CH_3 + HBr \to ?$ What will be the product formed?

The major product formed in the following reaction is:

$2$-Butanol $\xrightarrow[\Delta]{H^{+}}$ Products. If all products formed in the above reaction undergo reaction with $Br_2(CCl_4)$ individually,then the number of products formed will be: