How is the present value of a single sum (Appendix B) related to the present value of

Question:

How is the present value of a single sum (Appendix B) related to the present value of an annuity (Appendix D)?

Annuity
An annuity is a series of equal payment made at equal intervals during a period of time. In other words annuity is a contract between insurer and insurance company in which insurer make a lump-sum payment or a series of payment and, in return,...