a. identify the short-term spike. What caused this spike? Which currency is appreciating when the plotted exchange rate falls? U.S. Dollars to U.K. Pound Sterling Spot Exchange Rate (DEXUSUK) Observation Uwit Frequency DOWNLOAD EDIT GRAPH 2016-06-30 1.3242 (more) US Dollars to One UK Pound Sterling Daily Updated: Jun 13, 2022 Not Seasonally Adjusted 1Y|SY| 10 Max 2016-01-01 to 2016-05-30 FRED -U.S. Dollars to UK Pound Sterling Spot Exchange Rate 1.50 Tue, Jan 5, 2016: 1.4664 1.46 1.45 144 mr w 1.42 1.40 V 1:38 1.36 1:34 1.32 2016-01-11 2016-01-25 2016-02-08 2014-02-22 2016-05-16 2016-05-30 2016-06-13 2016-06-27 Serie Shaded areas indicate U.S. recessions. fred.stlouisfed.org US Dollars to One UK Pound Sterling 2016-03-07 2016-03-21 2016-04-04 2016-04-18 Source: Board of Governors of the Federal Reserve System (US) 2016-05-02