Send workflow mail to approvers in the list

Hi All,

In SharePoint Online(Office 365) list we have multiple approvers in the people picker control.

Please find the below screenshot.

When we start the workflow, automatically workflow needs to pick the first person as a first approver, second person as a second approver etc.

Once first approver approve the document(Document as a list attachment) automatically second approver will get the mail for approve the document.

Thanks for appreciation.

Thanking You, Nagendra.