How to fix this error?

In one of the engineering applications the relation of x and y is given by: 4e0.3x 0.5y y = 2 dx LL cic clear all xi=0; xf=2; h=0.01; Il x=xi:h:xf; y (1)=2; II F for i=1: (xf-xi) /h Y_star=y(i) +h* (4*exp(0.8*x(i))-0.5*y(i)); y(i+1)=y(i) +h* (((4*exp(0.8*x(i))-0.5*y(i))+(4*exp(0.8*x(i+1))-0.5*y(i+1)))/2); end TII [xl, yl]= ode45 (@(x, y) 4*exp(0.8* (x))-0.5*y, [0,2],2); figure plot (x, y, 'LineWidth', 2) hold on plot (x1, yi, 'LineWidth', 2) mmand Window Index exceeds the number of array elements (1). Error in Untitled (line 12) y(i+1)=y (i) +h* (((4*exp(0.8*x(i))-0.5*y(i))+(4*exp(0.8*X(i+1))-0.5*y(i+1)))/2)