Assume that the following equation estimates the relationship between the level of air pollution (E) in Klang valley and

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Assume that the following equation estimates the relationshipbetween the level of airpollution (E) in Klang valley and its per capita income (I):
E = 5(I) – 0.5 (I)2,
where E is the level of particuate matter measured in microgramsper cubic metre of airemissions, and I is measured in thousands of Ringgits.i. Sketch the graph of the equation, and explain how it supportsthe theory of anenvironmental Kuznets curve (EKC).
(5 marks)ii. If a country’s per capita income (I) increases from RM2,500 toRM3,500, what wouldbe the associated change in emission level (E)? What do thesechanges suggest aboutKlang Valley’s current position on the EKC for particulatematter?
(4 marks)iii. At what level of per capita income does EKC for particulatematter go through a turningpoint? Show your calculations. What is the significane of thisincome level?