What quarterly compounded nominal interest rate is earned on payments of $215 paid at the beginning of every month for nine years out of an investment of $18,000? The nominal rate is % compounded...

Extracted text: What quarterly compounded nominal interest rate is earned on payments of $215 paid at the beginning of every month for nine years out of an investment of $18,000? The nominal rate is % compounded quarterly. (Round to four decimal places as needed.)