Final answer:
The minimum amount the firm must pay per share to its preferred stockholders next quarter is $2.25.
Step-by-step explanation:
To determine the minimum amount the firm must pay per share to its preferred stockholders next quarter, we need to consider both the common and preferred dividends. The common dividend is $1.10 per quarter per share of common stock, and the preferred dividend is $2.25 per quarter per share of preferred stock. Since the question mentions that the company plans to pay a common dividend, we can assume that the minimum amount the firm must pay per share to its preferred stockholders next quarter is equal to the preferred dividend of $2.25.