How to partiton

I have 380 GB HDD. I used windows, and I have data on D: 100 gb, E: 100gb, and C: 80 gb for windows OS. I want to know that I want to replace C: only. I need some clarification on how do i partition C: only. Please let me advise how to partition C:. What about root, swap, home? Please explain in detail. how much GB must i allocate for root, swap home within the C:. Thanks

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