write java variable declarations to

$1)$ create a single$-$dimension array with the answers to $20$ true$/$false questions.

$2)$ a single dim. array that contains the average family size for the years $1900-2010($increment every $10$ years$)$

$3)$ a two$-$dimensional array for inches of rainfall for each month over a $5$ year period.

$4)$ a single$-$dim array with $8$ candidates in election. define Candidate class, with private instance variables for name$/$number of votes.