Consider the following pool of mortgages: - 100 mortgages each with initial balance of $291297, interest rate 2.2%, issued for 30 years with monthly payments - 80 mortgages each with initial balance of $278805, interest rate 4.8%, issued for 15 years with monthly payments What is the Weighted Average Coupon (WAC) for this pool at origination? Express your answer as a rate rounded to 2 decimal points (e.g. if your answer is 5.112%, write 5.11)