The following expression:

max$($number$\_$list$)$

$...$ will print the largest value in number$\_$list $($i$.$e$.,20).$ What value should be the variable index 'idx' in the code below so that the expression

sorted$($number$\_$list$)[$idx$]$

$...$ does the same thing. $($i$.$e$.,$ when you run the cell, it should display $20.)$

hint: idx is a negative integer.