Ethylene reacts with bromine to form

Bromination of cyclohexene under the conditions given below yields:
Cyclohexene $\xrightarrow{Br_2/hv}$ ?

The reaction of ethene with $Cl_2$ in a saturated solution of $KBr$ yields:

The major product of the following reaction sequence is:

Predict the product$(s)$ obtained for the following reaction:
$3$-methylcyclopentene + $Br_2 / CCl_4 \rightarrow ?$

What is the product obtained from the reaction of propene with $HCl$,$HBr$,and $HI$ in the presence of peroxide?