B16 Annuity Immediate vs Annuity Due

Question 1

For a set of paymetns of 1 at times 1, 2, …., n, which of the following annuities can be used to vlue the set of payments:

a angle n
ä angle n
s angle n
s̈ angle n

Answer 1

Any of the annuities (a angle n, ä angle n, s angle n, s̈ angle n) can be used to value the set of payments.

The only differences b/w these are where on the timeline the valuations are located