Question & Answer: write a subclass, CalculatorWithMemory, that contains: a double  instance variable , memory, initialized to 0…..

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