Answer
a. $0$ and $0$
b. $1700$ and $1400$
Work Step by Step
a. Reading the population graph, the maximum of rabbit population occurred at $x=40$ days; its derivative is $0$ (read from second figure), and the minimum of rabbit population occurred at $x=200$ days; its derivative is $0$ (read from second figure).
b. Reading the derivative graph, the maximum of the derivative occurred at $x=20$ days, which corresponds to a rabbit population of $1700$, and the minimum of the derivative occurred at $x=62$ days, which corresponds to a rabbit population of about $1400$.
