A shopping cart consists of items. An item can be either a household or an electronic...

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A shopping cart consists of items. An item can be either a household or an electronic item. The following UML diagram represents item, household item, electronic item and their relationship. Householditem () discount double (+) Householditem(id: String, description: String unitPrice: double, discount double) (+) computeSale Price(): double (+) toString(): String (-) id: String (-) description: String (-) unitvice: double (-) numberOfitem: Int Mem (+) Item(id String, description: String, unitPrice: double) (+) getNumberOfitem): int () compute Sale Price: double (+) tostring): String Electronicitem (-) warrantyPeriod: int (-) warrantyCost: double (+) Electronicitem (id: String, description: String, unitPrice: double, warrantyPeriod: int, warrantyCost: double) (4) computeSale Price: double (+) toString(): String Given above scenario and UML diagram, complete the following method that will compute the average price of the electronic items in the cart. public static double averageElectronicitem(item 1 cart) 4 // your code here A shopping cart consists of items. An item can be either a household or an electronic item. The following UML diagram represents item, household item, electronic item and their relationship. Householditem () discount double (+) Householditem(id: String, description: String unitPrice: double, discount double) (+) computeSale Price(): double (+) toString(): String (-) id: String (-) description: String (-) unitvice: double (-) numberOfitem: Int Mem (+) Item(id String, description: String, unitPrice: double) (+) getNumberOfitem): int () compute Sale Price: double (+) tostring): String Electronicitem (-) warrantyPeriod: int (-) warrantyCost: double (+) Electronicitem (id: String, description: String, unitPrice: double, warrantyPeriod: int, warrantyCost: double) (4) computeSale Price: double (+) toString(): String Given above scenario and UML diagram, complete the following method that will compute the average price of the electronic items in the cart. public static double averageElectronicitem(item 1 cart) 4 // your code here