Which object type should be queried to return all running instances of a process?

Refer to the exhibit.

A new activity is added to an existing process, along with a decision split. However, in the new
version of the process, the activity Notify of Decision never appears in the user’s inbox regardless
of whether finance approval is required. No other changes were made to the process. What is the
most likely cause of the issue?

A Process Data Mapping activity that is configured to be performed on behalf of the Workflow
Supervisor assigns a value to an attribute of a package in a workflow. The activity fails to execute,
and the resulting error implies the user has insufficient permissions to execute the required action.
According to EMC best practices, how should this issue be resolved?

A task in a work queue has been viewed by a user in the advance_queue_processor role and the
user has closed the browser without closing the task properly. As a consequence, other users are
prevented from acquiring the task.
Which attribute of the dmi_workitem object needs to be cleared to release the lock?

Which specific permission(s) must a user have on a process template to invoke/start an instance
of it?