Consider the following pool of mortgages:

• 100 mortgages with initial balance of $272,786, interest rate 4.5%, issued for 30 years with monthly payments
• 50 mortgages with initial balance of $337,385, interest rate 2.9%, issued for 15 years with monthly payments

What is the Weighted Average Coupon for this pool at origination? Express your answer as a number rounded to 4 decimal points (e.g. if your answer is 5.112%, write 0.0511).