Consider the function f defined on [0, 1] such that f(0) = 1, ƒ(1) = 3, f(1/5) = f(3/5) = 4, and f(2/5) = f(4/5) = c. Suppose that the approximation of I = S f(x)dx by composite Trapezoidal rule with...

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Extracted text: Consider the function f defined on [0, 1] such that f(0) = 1, ƒ(1) = 3, f(1/5) = f(3/5) = 4, and f(2/5) = f(4/5) = c. Suppose that the approximation of I = S f(x)dx by composite Trapezoidal rule with 5 subintervals is 1.8, then the value of c is: O 0.5 О 4 O -0.5 O 2