need a $2$ sequance diagram of a medical diganosis expret system

one for the $($user$)$ who will be able to

$1$ log onto the system or create a new account

$2$ the user will be asked questions by the system

$3$ the system will give the user a diagnosis$/$ results

$4$ the user will be able to exit the system

one for the $($admin$)$ who will be able to

$1$ update the database

$2$ exit the system