rite a function for summing all the elements in a matrix A$,$ namely,

V $=$

n$$

i$=1$

n$$

j$=1$

Aij $.$

$($Hint: Use the build$-$in function size to obtain the dimensions of a matrix.$)$ You may call the

function MatSum.

Then, test your function to compute the summation of all the elements of

A $=$

$$

$$

$12\mathrm{.}21\mathrm{.}22\mathrm{.}4$

$234$

$2\mathrm{.}56\mathrm{.}23\mathrm{.}4$

$$

$.$

What to hand in: the source code for the functions, as well as the script file for using the

functions. You should also turn in the output results from Matlab.

$2$