Specify the reagent you would use in each step of the following synthesis:

Reagents Available

a$.LiAl{H}_4$

f$.PB{r}_3$

k$.C{H}_{3}C{H}_{2}MgBr$

b$.H_{2}S{O}_4$

g$.$ Dess$-$Martin periodinane $($DMP$)$

I. $C_6{H}_{5}MgBr$

c$.HCl$

h$.$ NaH $($phenylmagnesium bromide$)$

d$.HBr$

i$.$ NaOH

m$.(C{H}_3{)}_{2}CHMgBr$

e$.SOC{l}_2$

j$.C{H}_{3}MgBr$

n$.Cr{O}_3$

Write the letters of the reagents in the boxes below.

Reagent for step $1$

Reagent for step $2$