Hi Im new to Fourier Series and have a question about sketching graphs by using the following information:

1). f(x) = 3x - x^2 0 < x < 3

f(x) = f(x + 3)

2) f(x) = 2 sin x 0 < x < pi

f(x) = 0 pi < x 2pi

f(x) = f(x + 2pi)

how do I use this info to sketch the graphs?