They've given us the rate function right over here. And so if you want to find a change in population from one time to another time, what you could do is you could take the integral of the rate function from the starting time, t is equal to two years, to t is equal to seven years. So we're gonna take the integral of the rate function, and what this is going to tell us, this is going to tell us the change in population from time two to time seven. So this is, you could say, let me just write this, this is the change, I'll use delta for change, or let me just write it out. Change in population, change in population, population, but they don't want us to, they're not asking us for the change in population. They want us to know what is the town's population at t is equal to seven. So what you would want is, you would want what your population is at t equals two, plus the change in population from two to seven, to get you your population at seven.