Mr. jernigan owns a piece of land on which he grows corn. corn production annually requires $2,000 in seed, $7,000 in fertilizer, and $6,000 in pesticides. mr. jernigan uses his own labor to grow the corn and therefore hires no workers. if mr. jernigan did not use his time to grow corn, he would instead be able to sell insurance, earning $25,000 per year. suppose another farmer has just offered to pay mr. jernigan rent of $15,000 per year for use of the land. if mr. jernigan refuses to rent the land to another farmer, then what will be his accounting costs from farming corn himself on his land? what will be his economic costs? mr. jernigan's accounting costs will be

Stocks a, b, and c are similar in some respects: each has an expected return of 10% and a standard deviation of 25%. stocks a and b have returns that are independent of one another; i.e., their correlation coefficient, r, equals zero. stocks a and c have returns that are negatively correlated with one another; i.e., r is less than 0. portfolio ab is a portfolio with half of its money invested in stock a and half in stock b. portfolio ac is a portfolio with half of its money invested in stock a and half invested in stock c. which of the following statements is correct? a. portfolio ab has a standard deviation that is greater than 25%.b. portfolio ac has an expected return that is less than 10%.c. portfolio ac has a standard deviation that is less than 25%.d. portfolio ab has a standard deviation that is equal to 25%.e. portfolio ac has an expected return that is greater than 25%.