To write the function given above as a Fourier series expansion, the following is required: 1-Calculate the coefficient A (0). 2-Calculate the coefficients A(1), A(2), A(3) 3-Calculate the coefficients B(1), B(2), B(3) 4-Using the coefficients you calculated above, write the Fourier series expansion of the function f(t). 5-Draw the graphical distribution of f(t) on the frequency axis. -0.6 W -0,2 -0.4 ^ f(t) O 0,2 0,4 0.6 t(s)