QUESTION $1$

Bryna wants to buy a car that is available at two dealerships. The price of the car is the same at both dealerships. Best Buggies would let her make quarterly payments of $$3,000$ for $6$ years at a quarterly interest rate of $2\mathrm{.}80$ percent. Her first payment to Best Buggies would be due in $3$ months. If California Cars would let her make equal monthly payments of $$800$ for $8$ years and if her first payment to California Cars would be today, then what is the monthly interest rate that Bryna would be charged by California Cars? Answer in decimal format, rounded to the nearest hundredth of a percent $($for example, $1\mathrm{.}23\%$ would be entered as $\mathrm{.}0123).$