I am so lost i can do the first year dividend i do not understand the rest

Dividends Per Share Internal Insights Inc., a developer of radiology equipment, has stock outstanding as follows: 12,000 shares of cumulative preferred 1% stock, $150 par, and 40,000 shares of $20 par common. During its first four years of operations, the following amounts were distributed as dividends: first year, $12,120; second year, $33,880; third year, $46,280; fourth year, $76,800. Compute the dividend per share on each class of stock for each of the four years. Round all answers to two decimal places. If no dividends are paid in a given year, leave it blank. 1st Year 2nd Year 3rd Year 4th Year 1.01$ X $ $ Preferred stock (dividend per share) Common stock (dividend per share) $ Feedback Check My Work Is the preferred stock cumulative or non-cumulative stock? Determine the amount of current dividends that preferred stock should receive per year. Is the question asking for a per share amount or total amount per class of stock