How to retrieve tasks along with duration inside a process with APIs?

Summary

Need to retrieve duration of each task inside a process with API

Content

Hi, 

How can I retrieve the duration of each task inside a process like the image attached below?

I need to calculate the duration of the whole process by summing up the expiration of each task in the process.

Tried to call the /bpm/api/4.0/tasks/  (https://docs.oracle.com/en/cloud/paas/process-cloud/cprrb/op-tasks-id-get.html) but it does not return the expiration time neither due date.

 

https://nononononono.integration.ocp.oraclecloud.com/bpm/api/4.0/tasks?assignment=ALL

Returns

{
    "totalResults": 15,
    "count": 15,
    "hasMore": false,
    "items": [
        {
            "title": "Approve Request for ProcessTravelProcess",