Take your stock from part $($a$)$ and look at its chart for the last month. On paper, sketch a curve to represent the graph of the rate of change of the stock value as a function of time. Remember that a sketch does not have to be $100\%$ accurate $($don$$t do any calculations!$).$ Upload both a screenshot of the original chart and your new graph side by side. Be sure to label your graph clearly, including appropriate labels and units on the axes.

$$ Based on your new graph, when were the best times to buy or sell the stock?

$$ In plain language, explain to a stock trader what it means when your new graph crosses the x$-$axis. Also

explain whether they should buy, sell, or hold, at those times.