Suppose the class named DiscountSale is a derived class of a class called Sale, and suppose the class Sale has a method with following heading and nog other method named , getTax, as follows: public double getTax() And Suppose the definition of the class DiscountSale has a method definition with the following heading and no other method definitions for methods named getTax, as follows: public double getTax(double rate); How many methods name getTax will the class DiscountSale have and what are their headings