Consider the following pool of mortgages:

100 mortgages each with initial balance of $140147, interest rate 4.6%, issued for 30 years with monthly payments

80 mortgages each with initial balance of $160124, interest rate 4.2%, 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