need a one ACTIVITY diagram of a medical diganosis expret system

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

$1$

$$log onto the system or create a new account

$2$

$$user will choose a symptom that they are suffering from

$($can choose up to $2$ symptoms$)$

$3$

$$the user will be asked questions by the system

$4$

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

$5$

$$the user will be able to exit the system