Chapter 10.2, Problem 38E

Say that the function f(x) is x for -π < x < 0 and zero for 0 < x < π. Find the a0 coefficient for the Fourier Series.

1. Find the Fourier series of f(x) = x² F(-2)? - x defined for -2 ≤ x ≤ 2 if ƒ (x + 4). What is BONUS: Truncate the series to n = 3, 5, 10. Plot the 3 series in one graph. What is F(−2) for each?

I don't understand what I'm doing wrong.