Also, please find the marginal profit at x=5

Suppose that the total profit in hundreds of dollars from selling x items is given by P(x) =5x -4x +8. Complete parts a through d below. a. Find the average rate of change of profit as x changes trom 3 to 5. $ per item b. Find the average rate of change of profit as x changes from 3 to 4. $ per item c. Find and interpret the instantaneous rate of change of profit with respect to the number of items produced when x = 3. (This number is called the marginal profit at x = 3. $ per item What does this result mean? Choose the correct answer below O A. When items are sold for $ the profit is decreasing at the rate of $3 per item. O B. When 3 items are sold, the profit is decreasing at the rate of $ per item. O C. When items are sold for $ the profit is increasing at the rate of $3 per item O D. When 3 items are sold. the profit is increasing at the rate of $ per item