The enumeration below defines the categories of items sold in a Yarn shop. The shop sells yarn, accessories, patterns, and books. Each enum constant requires a value for the discount percentage when there is a sale. Complete the Category enumeration below so that a programmer can use it to determine the discount value for a given constant: add any other members necessary to create a valid enum class (5 marks) public enum Category { YARN (0.2), ACCESSORIES (0.10), PATTERNS (0.05). BOOKS (0.25)