please answer example 5 and 6 thank you

Example 5: Suppose the firm's profit function is P(q)=2q25q+6. a. Find the average rate of change of profit from 2 to 4 . b. Find the additional profit earned when the third unit is produced. c. Find the marginal profit at a quantity of 2 . d. Find the marginal profit at a quantity of 4 . Example 6: Suppose the revenue from producing q units is R(q)=10q0.002q2. a. Find the average change in revenue from 1,000 to 1,010. b. Find the additional revenue earned when 1,000 units are produced. c. Find the marginal revenue at a quantity of 1,000 . d. Find the revenue maximizing point