To find if it is 64bit or 32bit you can open control panel. Change the view to small or large icons if needed.
Open system. Then look under system where it says system type, it should say 64-bit operating system.
Almost all computers are 64bit now, which is why I assume those are the correct ones for you.
The updates don't necessarily have to say cumulative update part, that part just means it would also include any previous updates as well.
The parts that matter is that it says for Windows 10 and x64 (assuming your computer is 64 bit).