2. When new IPhones come out, the price of the previous IPhone
drops. The price of the IPhone 10 has been the following:
2018: $1000
2019: $700
2020: $490
2021: $343
2022: $240
a. What type of sequence do we have?
b. What is the ratio/difference?
c. How much will the IPhone 10 cost in 2025?