how to find its convolution?

how to write Write a MATLAB code to plot the first 25 values of the step response. with command command conv.

Consider two systems having impulse responses

h1[n]= (1/6, 0≤n ≤5

0, otherwise)

h2[n]= (1/7, n = 0,4

-1/8, n = 1,2,3

0, otherwise )