Sorting in PERL

Greetings all,
I've had some difficulty figuring out this whole PERL sorting thing. I'd
like to be able to sort by parts of an array, if possible.

For example:
$line[0] = "Arthur,Johnson,53";
$line[1] = "Bob,Franklin,12";

If I wanted to sort by the first field, First Name, is it possible?
If I wanted to sort by the third field, Age, how would I do that?


Any information would be appreciated.
Thanks,
--Bill

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