Taxable Interface

Here is Taxable:

A Taxable item,
- has a taxRate of 6 percent, which should be a double constant.
- and a calculateTax() method. which should return a double value.

The Taxable interface looks like this:

interface Taxable
{
  final double  =  ;
  
  double () ;
}

final means that what follows is a constant, not a variable. Variables are not allowed in interfaces. Recall that final can be omitted since the compiler will automatically make the identifier a constant. But it is nice to say final to make it clear that the value is constant. The = value part cannot be omitted.

The method (in the fourth line) is public by default.

Answer:

Taxable Interface

QUESTION 10: