The following table provides information about the top selling books of all time.

$\backslash$table$[[$Rank$,$Book,Author$($s$),$Language,$\backslash$table$[[$Year$],[$Published$]],$Sales,Genre$],[1,$A Tale of Two Cities,Charles Dickens,English,$1859,200$ million,$\backslash$table$[[$Historical$],[$fiction$]]],[2,$The Little Prince $($Le Petit Prince$),\backslash$table$[[$Antoine de$],[$Saint$-$Exup$$ry$]],$French,$1943,150$ million,Fantasy$],[3,$Harry Potter and the Philosopher's Stone,J$.$ K$.$ Rowling,English,$1997,120$ million,$\backslash$table$[[$Fantasy$,],[$Mystery$]]],[4,$The Hobbit,J$.$ R$.$ R$.$ Tolkien,English,$1937,100+$ million,Fantasy$],[5,$And Then There Were None,Agatha Christie,English,$1939,100$ million,Mystery$]]$

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Part $1$ of $2$

Which of the columns represent qualitative or quantitative variables?

The column Rank represents variables.

The column Book represents variables.

The column Author$($s$)$ represents variables.

The column Language represents variables.

The column Year Published represents variables.

The column Sales represents variables.

The column Genre represents $]$variables$.$