c$)$ Suppose you are given the data in the following table.

$\backslash$table$[[x,0,0\mathrm{.}5,1\mathrm{.}0,1\mathrm{.}5,2\mathrm{.}0],[y,0,0\mathrm{.}19,0\mathrm{.}26,0\mathrm{.}29,0\mathrm{.}31]]$

Write a Matlab function program that performs the backward difference approximation of $f^{\text{'}}(x).$ Submit both the code and the output.

$5$

$[$Total $=25$