. Question 1 Let f(x) = 2x10 - 2x" (a) Use the definition of a derivative or the derivative rules to find f'(x) = (b) Use the definition of a derivative or the derivative rules to find f"(I) = (c) On what interval is f increasing? Increasing: (d) On what interval is f decreasing? Decreasing:Question 2 The cost, in dollars, to produce a designer dog leashes is O(@) = x + 10, and the revenue function, in dollars, is R(x) = -2x* + 41x Find the profit function. P(x) = Find the number of leashes which need to be sold to maximize the profit. Select an answer v Find the maximum profit. Select an answer v Find the price to charge per leash to maximize profit. Select an answer v What would be the best reasons to either pay or not pay that much for a leash?. Question 3 > Consider the function f(x) = x-72x-+ 10, -5