APO Implementation

Hi,

We have R/3 4.6C which we are going to upgrade to ECC6.0. Parallel, we are planning to implement APO. I've the following question:

1) Can we install APO and Live Cache together?

2) How is the peformance of APO and Live Cache in Windows MS SQL 2005?

3) What is the minumin memory required for Live Cache?

4) Do we need 3 system landscape (DEV, QAS and PRD)?

I know for R/3 we need to perform the transports. But I need to know for APO

Kindly advice.

Thanks