So what we can do is break up this integral into two intervals. We can say the integral of f of x from negative one to zero of f of x, d x, plus, let me just write it this way so we don't have to keep rewriting the one half. Let me write, I'll use brackets. Plus the integral from zero to one of f of x, f of x, d x. And the reason why I broke it up like this is because this function has a different definition or it takes, it's a different, it's piecewise defined. It's different when we're less than or equal to zero versus when we are greater than zero. So that's why I like to break it up this way.