Question $1$

In a $5-$fold cross validation, the data is divided into $....$ parts, and at each time $....\%$ of the data

is used for training and $...\%$ for testing.

$10,50\%,50\%$

$10,90\%,10\%$

$5,10\%,90\%$

$10,10\%,90\%$

$5,80\%,20\%$