Upgrade of BI and BPC

Dear Experts,

Currently we are running ERP EHP5, BW 7.02, BO 4.0 and BPC 7.5 in our landscape.

The current requirement is to upgrade BPC 7.5 to BPC 10.0, as BPC 7.5 has many issues which are addressed in BPC 10.0

In this scenario, please let me know the following

1. Is upgrade of BPC 7.5 to BPC 10.0 possible? Or do we need to install a fresh BPC 10.0 system?

2. BPC 10.0 requires BI to be BI 7.3, therefore I have to upgrade BW from 7.02 to 7.3, can we upgrade from 7.02 to 7.3? How feasible is the upgrade? Please guide me how to go on with the upgrade.

3. Please guide me on how to go about it?

Please provide me any other inputs.

Thanks in Advance.