What ODE is solved by the following MATLAB code and what method is used? Include the initial condition in your answer.

1 function problem4_23 2 3 4 nsteps = 100; y = 1; t = 0; h = 0.01; 5 6 g=figure; 7 plot(t, y, 'ob') 8 xlabel('t), ylabel ('y') 9 hold on 10 for i=1:nsteps 11 12 13 14 a = feval(y); b = feval (y+h/2*a); c = feval (y+h/2*b); d = feval (y+h*c);