$1.$ Data fields holding a staff$\_$number$($integer$),$ last$\_$name$($string$),$ first$\_$name$($string$),$ base$\_$salary$($double$),$

sales$\_$made$($integer$),$ staff$\_$class$($char$),$ and the bonus for which the person is eligible $($double$).$

$2.$ Constant static fields holding the bonus rates per sales $($you can consider $2-$D array to store the information$),$ as a

percentage of salary, in accordance to the following bonus table: