Numerical Methods: Euler to Runge–Kutta · Easy problem

In Heun's method the second slope is evaluated at the Euler-predicted point: $k_2 = f(t_0 + h,\ y_0 + h\,f(t_0, y_0))$. For $y' = y + t$, $y(0) = 1$, and $h = 0.2$, find $k_2$. Express your answer as a decimal.