how do I improve this code?

hey matlabians, i have 2 vectors and i wanna inner product them arrey by arrey and write the result into the 3rd zeros vector. then i wanna add the 2nd arrey to 3rd arrey and write the result into the first arrey of 4th zeros vector, and add the 2nd one to 3rd one and to the 4th one and so on. i have a code but it's not sophisticated code, so i brought you my code and i wanna ask you if you have any better solution please help me. thanks a lot

clc,clear
i = 1;
x = [2 5 6 7 8];
y = [1 3 4 8 9];
z = zeros(1,10);
c = zeros(1,10);
m = 1;
for i =1:5
    z(i) = (x(i).*y(i));
    
        c(1) = z(1);
        c(2) = z(m)+z(m+1);
        c(3) = z(m)+z(m+1)+z(m+2);
        c(4) = z(m)+z(m+1)+z(m+2)+z(m+3);
        c(5) = z(m)+z(m+1)+z(m+2)+z(m+3)+z(m+4);
   
end

Answer 1

[Bruno Luong]

x = [2 5 6 7 8];
y = [1 3 4 8 9];

z = x.*y;
z(10) = 0;
c = cumsum(z);