Setting BPF activity for implied manager so that he can reject or approve

Dear experts,

I have the case as in the below picture:

In the example for Store1, Joe is the owner, Nicole is the reviewer, and Pete is the implied manager.

1.What is the normal activity setting for implied manager like in Activity 5? ( As my understanding, we add Pete as Performer, not required reviewer. He only view report and set work status to "Approve", then he can not reject. Right?)

2. In Activity5, How can we configure activity so that:

2.1. Pete can Reject or Approve

2.2. If Pete rejects the owner and reviewer of Store1 can be notified and then reopen the activity.

What is the best practice in this case?

Thanks very much!

Duyennx

notified and then reopen the activity.