Implement the Command design pattern for a simple system that allows someone to maintain a record of their assets and liabilities, and be able to get an itemized listing of their net worth, e.g Assets $245,000 House $28,000 Car/ $8,045 Yugioh Cards Collection $150,000 Savings Liabilities $210,000 Mortgage $40,000 Loans Net Worth $181,045 Following are the use cases for the system Add Asset (item name, value) Add Liability (item name, value) Display Net Worth A UML Diagram for the system in on the following page. Note that classes AssetDetails, LiabilityDetails and NetWorthDetails are just transient objects used to return information in one object rather than in separate parameter values stem Interface Descripion: String public static addtem(String name, boolean vegetarian):9tring public static getilemsO: String public static getNumvegetarianD String Assets sets: Assets labines e createl ng): AssetDet accliabilityldescription: String value: String): LiabityDetais String, value String) String pubic getAse0 Asets pubic getliabntesD:Liabities getNetNorthO:Stringll Liabilities Command Interface executeD Object Descnption:String constructor passed relerence to Agpregator constructor passed relerence to Aopregator constructor passed refrence to Aggregator relums assel adoed retums num of vegelarian items executoD Lia lityDetails