You are using the WACC approach to value Trinity Industries. The unlevered cash flows for the current year $($i$.$e$.,$ now$)$ and for the next three years $($i$.$e$.,$ Year $1,$ Year $2,$ and Year $3)$ are $$100,$ $$150,$ $$225,$ and $$275,$ respectively. Following the third year, you expect these cash flows to grow at $3\%$ forever. You have estimated that Trinity$$s WACC is $5\%.$

At which year do you estimate the terminal value, and what is the terminal value?