If Marcos want to restrict the effective interest rate that he pays on his credit card to $12\%$ per year, what APR rate should he look for if the credit card company is compounding:

a: $12$ times a year?

b: $52$ time a year?

c: $365$ times a year?

I need to know how to set this up and solve in excel, so please show step by step including formulas in excel. Screenshots would be very helpful.