Can I play these games on this laptop?

Laptop: Lenovo ideapad 8gb ram, 1tb HDD, Intel Pentium n3540 quad core processor, shared graphics card ( I don't know what that is )
I would like to play:
Minecraft with no lag
Skyrim
Fallout 3
Fallout new Vegas
Also I was wondering if it could play new games like the witcher 3 even if I had to use low graphics.
Thanks and does the ram matter that much because I can get a 4gb model for cheaper.

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