HP Compaq dx2400 cpu upgrade

Hello,

I have a HP Compaq dx2400 Microtower PC with motherboard IPIBL-LB (Benicia) According to the below https://support.hp.com/us-en/document/c01324212

it works with Intel Core 2 Quad (Y) Q9xxxx

Is it means that it is compatible to all Q series: Q9650, Q9550, q9505, q9400 etc?

Is it works with other series of socket LGA775 like Q8400?

Also, i would like to ask if the motherboard can work with Xeon E5450.

Thanks,

Nick