How can we get the TaskInstanceId from Task Model Id?

Hi,

Need to get the context of completed tasks in a given month.

Using below code able to find the tasks completed between the given date range.

AnalyticsManager analyticsManager = BPMFactory.getAnalyticsManager();

List<TaskDurationStatistics> lstTasks = analyticsManager.getTaskDurationStatistics(frmDt, toDt, Status.COMPLETED, -1);

From TaskDurationStatistics, I am getting the task model Id, but to get the task detail I need task instance Id.

Could someone please help me in getting the task instance ids from task model id.

Is there any api to find/search for an attribute value directly from the context of the completed tasks.

Thanks