Quant question compound, annual, understand, effective, question

bchadwick

I understand effective annual rates, but how do you calculate the quarterly compounded rate that equates to an annual compounded rate.
For ex )  a 5% compound annual rate is equal to the continuously compounded rate of 4.879% (ln(1.05)).  So 5% compounded annually is equal to 4.879% compounded continuously.
My question:  how do you you find the quarterly rate that equates to the 5% compound annual rate ??
Thanks