Consider the following table of annual mortgage rates and yields on 10-year Treasury securities:

Year	10-Year U.S. Treasury Yield (%)	Mortgage Rate (%)
2000	5.97	8.07
2001	4.99	7.28
2002	4.56	6.67
2003	4.02	5.82
2004	4.27	5.75
2005	4.27	5.52
2006	4.79	5.95
2007	4.58	6.01
2008	3.61	6.71
2009	3.29	7.37
2010	3.14	5.62
2011	2.75	4.99
2012	1.76	4.20
2013	2.38	4.38
2014	2.49	4.07
2015	2.10	3.89
2016	1.83	3.75
2017	2.34	3.99
2018	2.89	4.39

Required: a. What was the average annual spread on mortgage rates relative to 10-year Treasury securities over the 2000 to 2018 period? b. What was the correlation between annual mortgage rates and Treasury yields over the 20002018 period? (Use your financial calculator or the statistical functions in Excel.)