Need helpt o create convolution with two finite-length arrays, x and h, reutrning array, y

Please help!!

Using a second convolution function in Matlab that basically implements a real time convolution sstrategy:

function y= con_rt(x, h)

%% Real-time Convolution
% Real-time convolution #1
x = [1 4 2 6 5];
h = [4 -1 3 -5 2];
testlab2a;
testlab2a(x, h);

% Real-time convolution convolution #2
testlab2a(h, x);

% Real-time convolution #3
x = cos(2 * pi * (1:50000) / 16); % nice, big sequence
h = ones(1, 10);
testlab2a(x, h);

[Sai Sri Pathuri]

Can you provide code for testlab2a function?