$(7$ and $9$ pts$)$ For the following sequences of reactions, work through all the different steps and then write the final product$($s$).$ Assume only the predominant product is formed at each step. You must indicate stereochemistry with wedges and dashes. You must draw all stereoisomers produced as predominant products and write "racemic" under the structures when appropriate. Assume no rearrangments take place.

$B{r}_2$ and light $($hv$)$

$NaOC{H}_3$

$B{H}_3$

$H_2\frac{O_2}{N}$aOH

$B{r}_2$

$3NaN{H}_2$

Mild $HC\frac{l}{H_2}O$

$1NaN{H}_2$

$H_2/$ Lindlar's catalyst

$Os{O}_4$

$NaHS{O}_3$