How many in the party have Altitude status? If only 1 it can’t be done. If 2, it is possible but you’d be playing aero lotto with some.

As an Altitude member you can upgrade 1 person travelling on the same reservation/PNR as yourself. This person can have the upgrade requested at the time you post your own upgrade request. In addition, you can request an upgrade for 1 person on a different PNR provided they’re on the same flight(s) as you however this request must be done at the airport (and maybe olci). Without status their upgrade doesn’t have a high chance of clearing typically.

To get pax 4 and 5 upgraded one of those 2 pax will need to have their own upgrade credits and upgrade other pax in the same manner as described above.

Also, as E35 you’re way down on the pecking order for upgrade, and if travelling flex you likely won’t have enough credits for 5 people anyways (depending on destination, exact fare bucket, etc.).