The best way to do this is by converting your data to an Excel table. Select your data range (A1:E11), press Ctrl + T, and click OK. Excel names it something like "Table1"; in my case, it's Table3, ...
If you've used Excel's Merge And Center tool for a long time (like I had), you could be forgiven for thinking there's no better alternative (like I did). Well, let me introduce you to Center Across ...
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