$2.$ Write function csv$2$lol$($fName$)$ that takes a string fName corresponding to the CSV file name and returns a list of lists. Each list $($in the list of lists$)$ consists of the entries a line in the CSV file produced by $.$split$-$ing the line at its commas. You'll write THREE variants of this function, corresponding to different approaches to reading the file and turning it into a list of lists:

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CSIS $153($Spring $2024)$ Prof. Cabanela

$$ readline$()$: reading a single line at a time.

$$ readlines$()$: reading all the lines at once.

$$ read$()$: read the entire file in as one string. You'll have to split the file up by

newline escape characters to get each line.

Your approach should be write the function implementing the first method, readline$(),$ and test it produces a valid list of lists $($all versions of the code will produce the same output list of lists$).$ Once you have confirmed it works, comment out the parts of the function that read in the file and implement the next method, readlines$(),$ and then after you get that working, implement read$().$