function [X, f1] = DeJong5(Xi)
f1 = 0;
f2 = 0;
f3 = 0;
m = 2;
j = 1:25;
a = [-32 -16 0 16 32 -32 -16 0 16 32 -32 -16 0 16 32 -32 -16 0 16 32 -32 -16 0 16 32;-32 -32 -32 -32 -32 -16 -16 -16 -16 -16 0 0 0 0 0 16 16 16 16 16 32 32 32 32 32];
                         %setting boundary and function
LL = -65.536;              %Lower limit
UL = 65.536;               %Upper limit
X = LL + rand(1,m)*(UL-LL);  % step1 Choose starting design X, 
for j = 1:1:25
    for n = 1:1:2
        f2 = f2 + (X(n) - a(n,j)).^6;
    end
    f3 = f3 + 1/j + f2;
end
f1 = f3 + 0.02;
end