This is another question that requires layman explanation(for Small Function).
I just can't figure out how to operate the function.

I found the Small function in this Formula:

=IF(ISERROR(SMALL(Data!$F:$F,ROWS($A$1:A1))),"", INDEX(Data!A:A,
MATCH(SMALL(Data!$F:$F,ROWS($A$1:A1)),Data!$F:$F,0 )))
-Max xl 97.-

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--Extracted from the HELPER!--
SMALL
Returns the k-th smallest value in a data set. Use this function to return
values with a particular relative standing in a data set.

Syntax
SMALL(array,k)

Array is an array or range of numerical data for which you want to
determine the k-th smallest value.

K is the position (from the smallest) in the array or range of data to
return.

Remarks

If array is empty, SMALL returns the #NUM! error value.

If k ‰¤ 0 or if k exceeds the number of data points, SMALL returns the #NUM!
error value.

If n is the number of data points in array, SMALL(array,1) equals the
smallest value, and SMALL(array,n) equals the largest value.

Example

SMALL({3,4,5,2,3,4,5,6,4,7},4) equals 4
SMALL({1,4,8,3,7,12,54,8,23},2) equals 3

I am even more confused after this.

Thanks.