Answer: 8.36%
Step-by-step explanation:
The growth rate being thrown in there was in an effort to confuse you into using the Dividend Discount Model.
This is a Preferred Stock however and is calculated differently as such,
Net Price = Dividends / rate
Making rate the subject we have,
r = Dividends / Net Price
So plugging in the figures we have,
r = 3/ 35.9
r = 0.08356545961
r = 8.36%
The market required rate of return on your firm's preferred stock is 8.36%.