This is the slope of the tangent line at time equals 0. If W's slope increases from that point, then W might look something like that. And then, our answer to part A would be an understatement, would be an underestimate of where W actually is after a fourth of a year. Let me make it clear to you what I'm doing. So this is my W axis. So this is right at our initial condition of 1400. And this right over here is our time axis.