your credit card calculates interest based on $16\mathrm{.}9516\mathrm{.}95\%$ APR, compounded monthlymonthly:$($a$)$ What are your monthlymonthly interest rate and annual effective interest rate?$($b$)$ If your current outstanding balance is $$3$ comma $9003,900$ and you skip payments for fourfour monthsmonths, what would be the total balance fourfour monthsmonths from now