Labeling A Graph

Hi,

I have a pretty maddening issue and I'm pretty sure it's easy to figure out but I can't. I simply need to name each column, and I plan on labeling them: "column 1," "column 2," etc. I also need to name what is currently titled "Series" into "Row 1," "Row 2," etc. How do I do this?? For some reason I can't seem to find a way. Thanks to those who help!

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