I need the matlab code and the plot for the curve

Its the second time i post this question

C(u) = Ni.p(u)P i=0 the above equation is the b-spline curve equation The order is 4 and PO=[1; 2] P1=[-2;2] P2=[5; -5] P3=[6;-2] P4=[0; 2] WRITE a matlab code to find N1,4 at u=0.5 a I need the code pls