Design a java program using thread synchronization to help the storekeeper. The shop is established with sensor fixed racks. The storekeeper is arranging the products in the 5 empty trays rack. A single product can be placed in each empty tray. The supplier has supplied 7 products. So, the storekeeper does not have enough space to arrange all 7 supplied products. But the storekeeper can place the product once sold product from the tray i.e., in an empty tray. Once the rack (i.e., all trays) is full, Sensors send the message to the storekeeper "Rack is full. Cannot place a product'. If the rack contains an empty tray, send the message as "Rack contains empty tray. You can place a product