A May 2015 Wall Street Journal article indicated that 2015 college graduates had the highest average student debt ever, at slightly more than $35,000 per student. The following data show the average student debt for the years 1993 through 2015 (Jeffrey Sparshott, “Congratulations, class of 2015. You’re the most indebted ever (for now),” http://blogs.wsj.com, May 8, 2015).
Year ...................................... Average Student Loan Debt

                                                (Rounded to nearest $000)
1993 ..................................................... $10,000
1994 ..................................................... $11,000
1995 ..................................................... $12,000
1996 ..................................................... $13,000
1997 ..................................................... $14,000
1998 .....................................................  $15,000
1999 .....................................................  $16,000
2000 .....................................................  $17,000
2001 .....................................................  $17,000
2002 .....................................................  $17,000
2003 .....................................................  $18,000
2004 .....................................................  $18,000
2005 .....................................................  $20,000
2006 .....................................................  $21,000
2007 .....................................................  $22,000
2008 .....................................................  $24,000
2009 .....................................................  $25,000
2010 .....................................................  $26,000
2011 .....................................................  $28,000
2012 .....................................................  $30,000
2013 .....................................................  $31,000
2014 .....................................................  $33,000
2015 .....................................................  $35,000

a. Produce a time-series plot of these data. Indicate the time-series components that exist in the data.
b. Conduct a test of hypothesis to determine if there is a linear trend in these data. Use a significance level of 0.10 and the p-value approach.
c. Use the model developed in part b to provide a forecast for the average student debt in 2017.