So I would go with this one. Our maximum value happens when x is equal to 2, and that maximum value is 8 natural log of 2 minus 4. That is the absolute maximum value over the interval, I guess we could say over the domain that this function is defined. If we want to verify it with a calculator, we of course could. So we already figured out this one, but let's see. f of 4, 8 natural log of 4 minus 16 is equal to negative 5. So this one is definitely not the maximum value.