Use a solution to Exercise C-2.25 to reimplement the FibonacciProgression subclass to rely on the BigInteger class, in order to avoid overflows all together.

Exercise C-2.25

Redesign the Progression class to be abstract and generic, producing a sequence of values of generic type T, and supporting a single constructor that accepts an initial value. Make all corresponding modifications to the rest of the classes in our hierarchy so that they remain as nongeneric classes, while inheriting from the new generic Progression class.