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4. Convert the following class diagram into an equivalent one and then write C# or Java code to implement the class diagram, including all functions listed in the diagram (10 points) Order Product odate:Date Time old:int promise Date:Date Time Orderline color:string dese:string qty.double sku:string unitcost: double GetorderAmount():double Orderline GetItem(): double GetUnitCost().double qty double T GetQty:double