Im just working through the logic now, without having sample data to test on I might not get answer for you, but...
This:
table product Successful sign-UP, Failed sign-UP, Successful sign-IN, Failed sign-IN
Needs to be this for starters:
table product "Successful sign-UP", "Failed sign-UP", "Successful sign-IN", "Failed sign-IN"
I'll let you know if I crack the rest.
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