Complete the following algorithm and solve for $n=5.$

return ${\displaystyle \underset{?}{\overset{?}{}}}(n+1{)}^2+n^2$;$55$

return ${\displaystyle \underset{?}{\overset{?}{}}}(n-1{)}^2+n^2$;$55$

return $(n-1{)}^2+n^2$;$41$

return ${\displaystyle \underset{?}{\overset{?}{}}}(n-1)+2n$;$30$