So it is going to have that general shape, and so it will indeed take on, it will indeed take on a maximum value. But how do we figure out that maximum value? Well, that maximum value is going to happen when the acceleration value, when the slope of its tangent line is equal to, when the slope of its tangent line is equal to zero. And we could also verify that it is concave downwards at that point using the second derivative test, by showing that the second derivative is negative there. So let's do that, let's look at the first and second derivatives of our acceleration, of our acceleration function. So, and I'll switch colors, that one's actually a little bit hard to see. So, the first derivative, the rate of change of acceleration is going to be equal to, so this is negative six t plus 12.