Suppose that the market for​ gluten-free spaghetti is in​ long-run equilibrium at a price of​ $3.50 per box and a quantity of 4 million boxes sold per year. Assume that the production of​ gluten-free spaghetti is a​ constant-cost industry. If the demand for​ gluten-free spaghetti increases​ permanently, which of the following combinations of equilibrium price and equilibrium quantity would you expect to see in the long​ run?