Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to create your own windows based operating system [title] Make sure you have all the requirements ready, you will need them. [step] The requirements are listed under things you'll need below. [title] Decide what cpu the os is compatible with.

Ending1: [step] Check out a set of cpu specs before you start to figure out what os you will be operating. [title] Go to start-] control panel. Ending2: [step] Some want a cpu with winrar and graphics, others will need a cpu with lite rom. If you plan on upgrading vista, make sure you can access this with built-in hardware by swapping it for ram. Ending3: [step] Your operating system will have to have at least 127 gb of memory. [title] Figure out what control panel you want to have. Ending4: [step] For example: x86 (32-bit), x64 (64-bit). Make sure your computer that you will target matches the cpu type you will specify later.

Answer format: ending1/ending2/ending3/ending4