Question 5 20 pts Please write solutions as exact values (no approximations). Use the following function, f(x) = 2x3 - 4x2 - x + 2 to find: a) Where is f(x) increasing? Decreasing? b) Determine local extrema c) Where is the graph of f concave upward? Downward? d) Find inflection points e) Find the intercepts Please write solutions as exact values (no approximations)Question 9 4 pts Find the derivative of f(x) =InQuestion 8 12 pts The marginal average cost of producing x watches is given by the function: A' (x) = -1700 If the average cost of producing 90 watches is $28 per watch. find: a) The average cost function b) The cost function c) Determine the fixed costs for production