A firm is raising funds by selling a package of equity, debt, and preferred stock.

https://www.investopedia.com/terms/p/preferredstock.asp

The details of the package are:

1) Equity sold for $20 million. Expected perpetual dividends to buyers is $2.15 million per year.

2) Preferred stock sold for $5 million. Expected perpetual dividends to buyers is $0.4 million per year.

3) Debt sold, perpetual risk-less (guaranteed) coupon payments to be $4 million a year and is discounted at a rate of 4.00% per year.

Assume no taxes and other Modigliani-Miller assumptions also hold.

What is the WACC for the firm?