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In an Inventory Management System for a music instrument sho…

In an Inventory Management System for a music instrument shop, we need an instantiable class for inventory items like the one at left (InvItems.java). Complete the following sections in this instantiable class.    Under the comment block a, declare instance variables to record attributes of each inventory item, including item ID, item name, unit price, unit cost, quantity on hand, and status. Choose proper data types and names for the instance variables to match with what the provided codes have used please. (5 pts) Under the comment block b, write a method for inventory selling. You can either get the order quantity using a parameter, or you can take the user input order quantity in this method. The method will check the inventory quantity. If the quantity on hand is greater or equal to the order quantity, the method will deduct the order quantity from the quantity on hand, and print a confirmation message for the transaction. If there is insufficient quantity in the inventory to sell, it will display an error message to the customer like “Insufficient  Inventory. Order cannot be processed,”  (5 pts) Under the comment block c., write a method to display one item record with its details and status. Here is the format of how the output should show. PLEASE NOTE: The inventory Cost is the result of quantity on hand * unit cost. Make sure you use proper spacing, lines and labels just like the sample format below. (6 pts) In the answer box, you can provide the comment lines that start with // a. Instance variable, // b. sellItem method, // c. displayItem method. Below the comment lines, you can provide the codes for each section. No need to provide the line number, and no need to copy the other codes that have been provided. In this question, you don’t need to write the program class to use this instantiable class. Provide the indentation as much as you can for better reading.