Iam having a hard time solving this and could use some

Maker-bot corporation has 10,000 shares of 10%, $90 par value, cumulative preferred stock outstanding since its inception. no dividends were declared in the first two years. if the company pays $400,000 of dividends in the third year, how much will common stockholders receive?

Identify the accounting assumption or principle that is described below. (a) select the accounting assumption or principle is the rationale for why plant assets are not reported at liquidation value. (note: do not use the historical cost principle.) (b) select the accounting assumption or principle indicates that personal and business record-keeping should be separately maintained. (c) select the accounting assumption or principle assumes that the dollar is the "measuring stick" used to report on financial performance. (d) select the accounting assumption or principle separates financial information into time periods for reporting purposes. (e) select the accounting assumption or principle measurement basis used when a reliable estimate of fair value is not available. (f) select the accounting assumption or principle dictates that companies should disclose all circumstances and events that make a difference to financial statement users.

4. suppose that pollution in a neighborhood comes from two factories, with marginal benefit curves given by mb1 = 12 – p1 and mb2 = 8 – p2. the level of pollution in the neighborhood is given by p = p1 + p2. the government wants to limit pollution by instituting a pollution-rights market. the government’s desired level of p is 10, so it prints 10 pollution rights and offers them for sale to the firms.a)find the equilibrium selling price of a pollution right, as well as the allocation of rights (and hence pollution levels) across the two factories. b)repeat part (a) for the case where the government’s desired level of pollution equals 14. c)comment on the usefulness of a pollution rights market in achieving efficient levels of pollution abatement.