Identify the mechanism by which each of the reactions above proceeds from among the mechanisms listed. Use the letters a $-$ i for your answers.

$Br$

$a=$ Proton transfer

$d=$ Radical chain addition

$g=E2$ Elimination

$b=$ Lewis acid$/$base

$e=$ Electrophilic addition

$h=S_{N}1$ Nucleophilic substitution

$c=$ Radical chain substitution

$f=E1$ Elimination

$i=S_{N}2$ Nucleophilic substitution

Identify the mechanism by which each of the reactions above proceeds from among the mechanisms listed. Use the letters $a-$ i for your

answers.