Which of the below are legal java variable names that follow the Java variable naming convention?

$($Select all that apply$).$

$3$points sum $\_$value i tax$\%$OfTotal minValue

What is the value of an uninitialized int variable?

Answer:

What is the value of an uninitialized reference$-$type variable?

Answer:

Write the single line of Java code required to declare a String array called "addresses" that is

initialized to an array of $10$ Strings:

Answer:

Write the method called "calcAverage" below that accepts a double array parameter called "values"

and returns the double average of the values in that array. If the "values" array is null, return $0.$

public double calcAverage $($double$[]$ values$)\{$