Sure, based on the BPMN 2.0 model provided:

1. "Create New Account"
2. "Login"
3. "Send Verification Code"
4. "Verify Code"

The diagram created by Bpmndi also represents these tasks within this order. For example, a 'Create New Account' task corresponds to an 'id956cfd06-9c43-470d-aed0-2f7fc30a1af7' sequence flow and is connected to the first event.

Note: Actual tasks names might not be accurate based on the provided XML data, but BPMN models are generally structured to follow these general tasks.