Numerical Methods: Euler to Runge–Kutta · Easy problem

In one step of the classical fourth-order Runge–Kutta method with $h = \dfrac{1}{2}$ from $y_0 = 1$, the four stages come out to $k_1 = 3$, $k_2 = 4$, $k_3 = 4$, $k_4 = 5$. The RK4 update is $y_1 = y_0 + \dfrac{h}{6}\left(k_1 + 2k_2 + 2k_3 + k_4\right)$. Find $y_1$.