Mark H. answered 12/11/19
Tutoring in Math and Science at all levels
f(0)=0
f is continuous and even --- I assume this means symmetrical about the y axis
f'(x)=2x if 0<x<1 --- This means f(x) = x^2 (no constant of integration since we are given x(0) = 0
note that f(1) = 1
f'(x)=-1 if 1<x<3 --- Slope is -1, meaning the line goes from +1 to -1 over the interval x=1 to x=3 (f(3) = -1)
f'(x)=1 if x>3 --- The line continues with a +1 slope
Then, the mirror image for negative x