True or False?

$1-$ when using the dimensional analysis tool, more number of laboratory experiments are required.

$2--$term is a dimensionless variable that relates several dimensional variables in a problem or problem with $$ variables, the number of $-$terms is always $n-3.$

$3-$ Reynolds number could be selected as a $-$term.

$4-$ Any $-$term could be multiplied or divided by itself or any other $-$term to get another $-$term.

$5-$ Any r$-$term could be a function of other $-$terms.