Let f 4 and f 5 be the fourth-order and fifth-order Fourier approximations in C[0, 2] to

Let f₄ and f₅ be the fourth-order and fifth-order Fourier approximations in C[0, 2π] to the square wave function in Exercise 10. Produce separate graphs of f4 and fs on the interval [0, 2π], and produce a graph of f5 on [-2π, 2π].

Data Form Exercise 10

Find the third-order Fourier approximation to the square wave function f(t) = 1 for 0 ≤ t < π and f(t) = –1 for π ≤ t < 2π.