The graph of y = f(x) is shown below. How many solutions are there to the equation f(x) = -f(x)?

The graph of y = f(x) is shown below. How many solutions are there to the equation f(x) = f(-x)?

The equation f(x) = -f(x) has four solutions.

The equation f(x) = f(-x) has one solution.

both are wrong