Consider these two tables generated by a brand$-$new downloading app, shown here along with their ERD. You will use these tables to answer questions $6$ through $8.$

Users Table:

id username premium$\_$user

$1001$ ziggy TRUE

$1002$ aladdin FALSE

$1003$ duke TRUE

$1004$ tom FALSE

$1005$ jareth FALSE

Downloads Table:

id user$\_$id file$\_$name

$1011002$ space$-$oddity

$1021004$ heroes

$1031002$ heroes

$1041005$ heroes

$1051001$ rebel$-$rebel

$1061002$ rebel$-$rebel

$1071005$ fame

$1081002$ changes