This problem has more to it but i'm getting stuck on this part. I need to solve the second order ode (d^2T)/(dx^2) - 0.15*T = 0. It has the initial conditions of T(0)=240 and T(10)=150 and step size of 5. To solve this I need to split it up into two first order ode's. So I split them up into dT/dx = z and dz/dx = 0.15*T. Now I need to do 4th order RK on these two equations. I'm confused about how to go about doing this.