For each part draw the structure of the main product expected from the two reactants given in the presence of a peroxide as a radical initiator.

$1.3-$cyclopropylprop$-1-$ene $+$ Br$2$

$2.2-$ethylhept$-1-$ene $+$ HBr

$3.$ hept$-3-$ene $+$ NBS