macbook requirements to run osx 10.10?

[Sunshine]

a friend wanted me to ask what are the requirements for using osx 10.10 
the latest version of osx
they have a macbook running snow leppard 10.63 2 gigs of ddr3 ram and an 
intell core 2 duo processer that is running 2.4 ghz.
Would they need to up the ram to be able to handel the osx 10.10 and 
then possibly the osx 10.11 when it is released?

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