Please find (c.) i think it has something to do with x +h

Bus Econ 3.3.25 Suppose that the total prot in hundreds of dollars from selling x items is given by P(x) = 4x2 7x + 6. Complete parts a through d below. 3. Find the average rate of change of prot as x changes from 2 to 4. $ 1700 per item b. Find the average rate of change of prot as x changes from 2 to 3. $ 1300 per item c. Find and interpret the instantaneous rate of change of prot with respect to the number of items produced when x = 2. (This number is called the marginal prot at x = 2.) $lj per item