I need help on this question

1. This first activity is to ensure you can use table data to find both an ARC and IRC. The average annual salary of both high school graduates and Bachelor's degree holders have been increasing since 1980. See table below. Year 1980 1990 2000 2010 High School 11,314 17,820 25,692 31,003 Bachelor's 18,075 31,112 49,595 57,621 a. What was the ARC of average salary for HS graduates between 1980 and 2010? b. What was the ARC of average salary for Bachelor's degree holders between 1980 and 2010? c. Whose average salary has been increasing faster? d. Using the data in the table, estimate the IRC of the average salary of Bachelor's degree holders in 2010 as best you can, and interpret your answer in terms of average salary