$($a$)$ It prints a rectangular box with $n$ rows and $m$ columns full of asterisks.

$($b$)$ It prints $m$ asterisks, one in each row.

$($c$)$ It prints $n$ asterisks, one in each row.

$($d$)$ It prints a rectangular box with $m$ rows and $n$ columns full of asterisks.

$($e$)$ It prints $m$ asterisks in a single row.

$($f$)$ It prints $mn$ asterisks, one in each row.

$($g$)$ It prints $n$ asterisks in a single row.

$($h$)$ It prints $mn$ asterisks in a single row.

$($i$)$ It prints a single asterisk.