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- Find the Fourier series representation of the periodic function below f(x) = cx2 - d if -π < x < π if c = 2.222 and d = 6.7. Then, find the value of an if n = 2.Q1/ Find the Fourier series for the Function f(x) = 4 - X2 ,When - 2 <X< 2Find the Fourier series representation of the functions afollow. (a) f(x) = x , 0 ≤ x ≤ 2π