And if we actually figure out this first question, the second question is actually pretty straightforward. We figure out the amount that it grows and then add it to what we were at at t equals two, add it to 1,500. So pause this video and see if you can figure it out. So the key here is to appreciate that this right over here is expressing the rate of how fast the population is growing and we've been seen in multiple videos now, let me just draw, do a quick review of this notion of a rate curve. So those are my axes and this is my t axis, my time axis. And so this is showing me how my rate of change changes as a function of time. So let's say it's something like this.