In an agricultural institute, scientists do experiments with varieties of seeds to grow them in different environments to produce healthy plants and get more yield. A scientist observed that a particular seed grew very fast after germination. He had recorded growth of plant since germination and he said that its growth can be defined by the function f(x) = (1/3)x³ − 4x² + 15x + 2, 0 ≤ x ≤ 10 where x is the number of days the plant is exposed to sunlight.

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