Consider the expressions given in question a and b below, interpreting each as the total value of a savings account into which you have been depositing $200 each year on January 1 (starting on January 1, 2011), and which compounds 5% interest annually on December 31 of each year.

a. ($200)(1.05)⁴ + ($200)(1.05)³ + ($200)(1.05)² + ($200)(1.05)¹

b. ($200)(1.05)⁴ + ($200)(1.05)³ + ($200)(1.05)² + ($200)(1.05)¹ + $200

what are the different interpretation of them?