To simplify the implementation of your function Percentages$\_0\_1\_$table$\_$CSA, we provide you

with a function called Percentages$\_$from$\_0\_1\_$table$\_$CSA. It takes a table of $0$ and $1$ as input,

and it returns the percentage of the sum of all $1$s per column across all columns.

$=$LAMBDA$($T$\_0\_1,$ LET$($

counts,BYCOL$($T$\_0\_1,$LAMBDA$($D$,$SUM$($D$))),$

percentages,counts$/$SUM$($counts$),$

percentages$))$