In problems 1 through 6 , determine the Fourier trigonometric series of each function. f(x) = {1−p < x ≤ 01 /20 < x ≤ p f(x) = {x−2 < x < 02−x0 < x < 2 f(x) = x, −π < x < π f(x) = {x+π−π < x < 0 x−π0 < x < π f(x) = |x|, −π ≤ x ≤ π f(x) = x2, −1 < x ≤ 1