Consider the following class, which is intended to serve as a blueprint for objects that encapsulate two pieces of data: an even integer and a non-negative real number: public class ValuePair { int a; double b; public static double product() { return this. a * this. b; } } (2 points) The method product is supposed to be an instance method that returns the product of the two fields inside a ValuePair object. However, when we attempt to compile this class, we get error messages that indicate that product cannot access the fields. (Hint: What is another name for an instance method).