Define a function ASCII$(x)$ where the parameter $x$ is a string, for example: ASCII$("$cat$").$ Your function then returns four $(4)$ items:

Length of string

List of ASCII codes for that string

Average of ASCIl codes

First letter in the string should input their string as the argument $x$ of your function.

Having defined your function ASCII$($X$),$ test it with the command $>>$print$($ASCI$("$cat$")).$ This command prints the return output to the screen:

$3,[99,97,116],104,{?}^{\text{'}}c\text{'}$