Answer: At least $5 lower than the price of Firm B
Explanation:
A preferred stock is a stock whereby the holder of the stock is entitled to a dividend which is usually fixed.
From the question, we are informed that Firm A has preferred stock outstanding that pays a dividend of $9.50 while Firm B has preferred stock outstanding that pays a dividend of $4.50.
With the information provided above, the price of Firm A is at least ($9.50 - $4.50) = $5 lower than the price of Firm B.