BRM Upgrade from BRM 7.5 PS7 -> MPS1-> PS22

Hi Team,

We are planning to upgrade our BRM Server from PS7 -> MPS1 -> PS22.

But we have two BRM Machines on the Production environment and one BRM Schema used by both the machines.

On BRM Machine 1 -> BRM Billing batch is executed (Pin_bill_day)

On BRM Machine 2 -> All other Operations are performed from SIEBEL<->AIA<->BRM

How should we perform Upgrade activity?

Also, do I need to execute the below scripts on both the machines?

MPS1:

1) 7.5MPS1_ThirdParty_platform_32_opt.bin

2) 7.5MPS1_21513185_Portal_Base_platform_opt

3) 7.5MPS1_21513185_Portal_SDK_platform_opt

4) 7.5MPS1_PortalBase_Upgrade_75_75PS