Investment funds. Annual investment assets (in billions of dollars) from 2000 to 2018 for three fund types provided by US investment corporations are given in the table below. ABBLAB ABBLAB FUNDS Year Closed-end Exchange-traded Unit Investment Trust 2000 150 66 74 2001 145 83 49 2002 161 102 36 2003 216 151 36 2004 255 228 37 2005 276 301 41 2006 299 423 50 2007 316 608 53 2008 185 531 29 2009 224 777 38 2010 239 992 51 2011 244 1,048 60 2012 265 1,337 72 2013 282 1,675 87 2014 292 1,975 101 2015 263 2,101 94 2016 265 2,524 85 2017 277 3,401 85 2018 250 3,371 70

a. Compute simple indexes for each of the three time series using 2000 as the base period.

b. Construct a time series plot that displays the three indexes.

c. Using the results of parts a and

b, compare and contrast the three types of funds.