3. No. Management Review is a team discussion to go through the agenda items, when there is only one person in Organization, can he have Management Review with Internal Auditor (external)? So this way you have top management as well as someone to discuss.
The requirement is for the management to review and maintain records.
So Mr x reviews all that Mr x has done and keeps a record of it, the inputs reviewed and outputs thereof decided, and Mr x follows up on all the decided actions and completes them, and further records in the next review.... and on and on.