10. Create and write an entire elass called FinalClass. This class will consist of one instance variable called grade(integer) and one class variable called F AII., which will be a constant integer and is set to the value of 65 . Add two constructors to your class, a default one that will assign grade to zero, and another that will assign grade to whatever is passed in as a parameter. Add a mutator/modifier method and an accessor method for the variable grade