// GET: MarkCalculator
        public ActionResult Index()
        {
            var model = new MarkCalculatorViewModel()
            {
            };

            return(View());
        }
        public ActionResult Index(MarkCalculatorViewModel model)
        {
            var mAb       = (model.Ab1 + model.Ab2) / 2;
            var desiredM  = model.DesiredFinalMark * 10;
            var notaFinal = (desiredM - (6 * mAb)) / 4;

            model.FinalMark = notaFinal;
            return(View(model));
        }