2. Write a C++ program about the following tax system: A family pays no tax if its annual salary is less than $5000. It pays a 10% tax if the salary range is from $5,000 through $9,999, a 20% tax if the salary range is from $10,000 through $19,000 and a 30% tax if the salary is $20,000 or more. Enter the annual salary as double from the keyboard and display the annual salary and the tax the family should be paying.