A $1$ bit binary Full attitude to add to binary bits $($A$,$B$)$ and a $1$ bit carry$-$ in $($CIN$)$ and results in a $1$ bit sum and $1$ bit carry out $($COUT$)$ Drawing simplest nand circuit equivalent the simplest sum of products please

A $4-$bit adder to add binary numbers$($A$3,$A$2,$A$1,$A$0$ and B$3,$B$2,$B$1,$B$0$ with A$0$ amd B$0$ being least significant bits$)$ and a $1$bit carry in $($cin$)$ and results in a $4$ bit sum $($s$3,$s$2,$s$1,$s$0)$ and $1$bit carry out $($cout$)$ with the $1$bit full adder component you built $($draw$)$ the ciruit please