Use the following table to answer the questions below

		2017	2018	2019	2020
Product	Quantity	Price
A	18	$6.0	$6.5	$7.0	$8.0
B	13	$6.5	$7.2	$7.8	$8.5
C	10	$7.6	$7.0	$7.4	$8.2

1. If 2019 is the base year, what is the inflation rate between 2015-2016?

2. If 2020 is the base year, what is the inflation rate between 2017-2018?

3. If 2017 is the base year, what is the inflation rate between 2018 and 2019?

4. If 2017 is the base year, what is the inflation rate between 2019 and 2020?