Examine yield curve shapes using daily yield curve rates provided by U.S. department of treasury .

a) Report treasure yield rates (1 month, 3 month, 6 month, 1 year, 2 year, 3 year, 5 year, 7 year, 10 year, 20 year, 30 year) on Jan. 02, 2014, Jan. 02, 2015, Jan. 04, 2016, Jan. 03, 2017, Jan. 02, 2018, Jan. 02, 2019, and Sep. 02, 2019.

b) Compute each term spreads for seven term structures.

c) Plot seven yield curves that show the relation between yields and maturities.

d) Provide your findings thoroughly from b) and c).