18. Slick Willie Inc. had the following shares outstanding during 2023: (1) Preferred shares, $3, cumulative, 1,000 shares with dividends in arrears for 2021 and 2022. (2) Common shares, 2,000 shares. The total dividends declared for the current year were $21,000. What is the total amount of dividends to which the prefer shareholders are entitled? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer a $3,000 b $6,000 $9,000 d $12,000