Create flows in Microsoft Power Automate

We currently use a Microsoft Planner board, where all inbound enquiries automatically create a task. Once done, we mark the task as complete. Our problem we have, is that we have hundreds of complete tasks in the bucket, and it's a manual operation to go in and delete them.

We'd like a Power Automate setup that will automatically delete completed tasks, either every week or if possible, delete completed tasks that are more than 15 days old.

Also to setup a power automate where every day at 9am, an email is sent displaying all tasks on a planner board that are not complete.