How to find out the correct firmware version

I need to flash Samsung N8000 tablet. I tried several firmware versions but none was a success.
I do not know if it is because of eMMC fault of firmware version .
The tablet shows
RP SWREV: A2

I tried firmwares:
N8000XWALG9_N8000OXXALG7
N8000XXCMA5_OXACMA5
N8000XXCMC1_OXECMB2

Is any of these a correct version?
How can I identify a correct version for this tablet N8000?

Thank you.