The Programming Language is in Scala.

To begin:

In Eclipse create a Scala project called ControlLab.

Add a worksheet to this project called session

Add a Scala interpreter to this project

In the session worksheet define and test the following functions. Your implementations should be as concise as possible. You should use library functions whenever possible.

Elbonia has a simple sliding scale income tax scheme. Your tax rate is determined by your income according to the following table:

Implement a tax calculator for the Elbonians using Scala's match expression.

Your calculator should throw an InvalidIncome exception if the input is negative.

Income $20000 = $100000 Rate 0% 5% 11% 23% 32% 50% /0