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write a subclass, CalculatorWithMemory, that contains: a double instance variable , memory, initialized to 0 a method , save, that assigns the value of accumulator

write a subclass, CalculatorWithMemory, that contains:

a double instance variable , memory, initialized to 0

a method , save, that assigns the value of accumulator to memory

a method , recall, that assigns the value of memory to accumulator

a method , clearMemory, that assigns zero to memory

a method , getMemory, that returns the value stored in memory

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