You know a number of ways to bring about this transformation. A three$-$step process is outlined below. Sort the reagents and steps required to complete the synthesis as shown.

NBS$,hv$

$HCE{C}^{-}$

$KCN,$EtOH

i$)C{O}_2$

ii$)H_3{O}^{+}$

i$)9-$BBN

ii$)H_2{O}_2,O{H}^{-}$

$H_3{O}^{+},$ heat