Request to review the below model

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the averages were assigned in as A1, A2, A3 already

I wish to find the closest value to 0 among the array of average values and return as A1, because -4 is the closest value in my model

I tried math.min (math.abs(a1-0), math.abs(a2-0), math.abs(a3-0)….
And it is returning as 4. I wish to have -4 and related assigned value as A1

Request to give a pine script code for the same.