Design goal: distinguish between design imperatives for static vs dynamic binding

Consider the design exercise given in chapter 5 Inheritance (the arithSeq hierarchy)you may refer to the sample solution in Appendix B.5

1) Explain why getNextValue() is virtual

2) Identify the impact on the client

3) Explain why reset() is not virtual

4) Identify the impact on the class designer

5) Give a sample design modification or a descendant class that would be hampered by #3