How will you bring about the following conversations in not more than two steps?
a. Propene to `1-` Nitropropane
b. Bromocethane to cis-hex `-3-` ene

Explanation

a. `CH_(3)CH_(2)OH overset(HBr)(rarr) CH_(3)CH_(2)Br`
`underset("Liq". NH_(3))overset(CH -= C-CH_(2) - CH_(3)`
b. `CH_(2) = CH_(2) overset(Br_(2)//CCl_(4))(rarr) underset(Br)underset(|)(CH_(2)) - underset(Br)underset(|)(CH_(2)) underset(-HBr)overset(Alc. KOH)(rarr) CH_(2) - CH - Br`
c. `CH_(3)CH = CH_(2) underset("Peroxide" +hr)overset(HBr)(rarr) CH_(3)CH_(2)CH_(2) NO_(2)`

e. `CH_(3)CH = CH_(2) overset(Br_(2)//C Cl_(4))(rarr) CH_(3) - underset(Br) underset(|)(CH) - underset(Br)underset(|)(Br) underset("Alc". KOH (-2HBr))overset(2 mol)(rarr) CH_(3)C -= CH`
f. `CH_(3)CH_(2)OH overset(HBr)(rarr) CH_(3)CH_(2)Br underset("Swart reaction")overset(AgF)(rarr) CH_(3)CH_(2) F + AgBr`