4. The graph shows the profit of a candy factory, p(x), in thousands of dollars, as a function of x, the change in weight per package from 50 grams. For example, when x = -1, each package weighs 49 grams. a) [50 word limit] Roughly estimate p'(x) when X = -1. What does it mean in this context? Remember to include units. Answer: b) [50 word limit] Suppose the graph above is actually p'(x) vs x. and the graph is p(x) is unknown. How should the company optimize its profit? Why