The table below shows the February balance of a simple interest savings account each year from 2015 to 2021 2015 $12,000 2016 $14,018 2018 $18,054 Year Balance 2017 $16,036 Do the balances form an arithmetic or geometric sequence? . What is the d or the r? Write a formula for the balance in the account n years after February 2015. Find the sum of the February balances from 2015 to 2032, inclusive. 2019 $20,072 2020 $22,090 2021 $24,108