11. A new species of bird is introduced into a sanctuary. Conservationists monitor the population of the birds for many years. The results are shown in the following graph. Bird Sanctuary Population fooz Population 12 14 10 18 20 Years a) Find the average Rate of Change from both () year 0 - 4 ii) years 8 - 18 Question 11 continued here: ) Estimate the instantaneous Rate of Change at year 2 c) When is the rate of change zero? AND What is the significance of this? 12. Consider the following graph of f (x): (3 Marks) a) State the value(s) of x where the rate of change of f(x) is zero. b) State the interval(s) over which the rate of change of f(x) is positive. c) State the interval(s) over which the rate of change of f (x) is negative