3. Let f(.'1:)=.'1:2, OSx

3. Let (a) (b) (c) Plot the graphs of the odd and even extensions of f. (Clearly indicate the points of discontinuity, if any.) Expand the odd extension of f obtained in part a) in a Fourier Sine Series Fs(x). Find all x R such that f (x) Fs(x). Calculate the exact value of Fs(l). [10]