$2.(10)$ Write a function that receives an input argument x and

returns y and z$,$ which should be calculated as follows:

$=2!$

$=34$

$3.(10)$ Given the following function header:

function doit$($a$,$ b$)$

Which of the following function calls would be valid and why?

A$.$ fprintf$(\text{'}$The result is $\%\mathrm{.}1$f

$\text{'},$ doit$(4,11))$

B$.$ doit$(5,2,11\mathrm{.}11)$

C$.$ x$=11$;

y$=3\mathrm{.}3$;

doit$($x$,$y$)$