Suppose that a firm's only variable input is labor. the firm increases the number of employees from four to five, thereby causing weekly output to rise by five units and total costs to increase from $3 comma 500 per week to $3 comma 800 per week. what is the marginal product of the fifth worker? nothing units. (your answer should be a whole number.)

David paid $975,000 for two beachfront lots in coastal south carolina, with the intention of building residential homes on each. two years later, the south carolina legislature passed the beachfront management act, barring any further development of the coast, including david's lots. when david files a complaint to seek compensation for his property, south carolina refuses, pointing to a passage in david's own complaint that states "the beachfront management act [was] properly and validly designed to south carolina's " is south carolina required to compensate david under the takings clause?