Why phosphoric acid is preferred to ${\mathrm{H}}_2{\mathrm{SO}}_4$ to prepare $\mathrm{HI}$ in situ?

Rewrite the following reaction by filling the blanks:

${\mathrm{CH}}_3-\mathrm{CH}={\mathrm{CH}}_2+\mathrm{HBr}\stackrel{ }{\to } \underset{\mathrm{major}}{\mathrm{\_\_\_\_\_}}+\underset{\mathrm{minor}}{\mathrm{\_\_\_\_\_}}$.

Rewrite the following reaction by filling the blanks:

${\left({\mathrm{CH}}_3\right)}_2\mathrm{C}={\mathrm{CHCH}}_3+\mathrm{HBr}\stackrel{ \mathrm{peroxide} }{\to } \underset{\mathrm{major}}{\mathrm{\_\_\_\_\_}}+\underset{\mathrm{minor}}{\mathrm{\_\_\_\_\_}}$

Rewrite the following reaction by filling the blanks:

${\mathrm{CH}}_3-\mathrm{CH}={\mathrm{CH}}_2+\mathrm{HBr}\stackrel{ \mathrm{peroxide} }{\to } \underset{\mathrm{major}}{\mathrm{\_\_\_\_\_}}+\underset{\mathrm{minor}}{\mathrm{\_\_\_\_\_}}$

Identify the product of the following reaction:

Identify the product of the following reaction:

Name the type of halide produced in the above reaction.