c$)$ Explain why the relation EMPLOYEE below does not satisfy $3NF$ and decompose it into relations, which do satisfy $3$NF$.$ What advantages are gained by this decomposition?

EMPLOYEE

$\backslash$table$[[$EMP$\_$NO$,$NAME,ADDRESS,DEPARTMENTS,DEPARTMENT$\_$MANAGER$],[$E$1,$Smith,Chez Nous,D$1,$E$1],[$E$2,$Brown,Mon Repose,D$1,$E$1],[$E$3,$Smith,Mon Repose,D$1,$E$1],[$E$4,$Jones,Sea View,D$2,$E$9],[$E$9,$Bloggs,The Nook,D$2,$E$9]]$