Can I add an email for the Requisition Notifications.

While create and approve Purchase Requisition the email checkbox is not enabled.

Requirement is,

If a specific user x creates a requisition, the notification will be sent to y as per the hierarchy.

But the flow is I want to send the information mail to z and w also.

the email check box is disabled for requisition approval form.

is this requisition approval form solves my issue?