Consider the following code which uses the String variable$$s:

if $($s$.$equals$($s$.$toUpperCase$()))$

$\{$System$.$out.println$("*")$;

$\}$

What does the code do$?$

Group of answer choices

Prints $"*"$ if the String s contains only letter characters $($no digits or symbols$).$

Prints $"*"$ if the String s contains only lower$-$case letters.

Prints $"*"$ if the String s contains non$-$letter characters followed by lowercase letters.

Prints $"*"$ if the String s contains only upper$-$case letters.

Prints $"*"$ if the String s contains a mixture of upper and lower$-$case letters.