The following table gives the average nominal interest rates on six-month Treasury bills spanning the years 1971 and 1975, which determined thenominal interest rate paid by the U.S. government when it issued debt in that time period. The table also gives the inflation rate for the years 1971 to1975. (All rates rounded to the nearest 0.1 percent.)Year197119721973INTEREST RATE (Percent)197419758.0Source: "FRED Economic Data," Federal Reserve Bank of St. Louis, last modified September 23, 2019, accessed September 24, 2019, https://fred.stlouisfed.org.7.0On the following graph, use the orange points (square symbol) to plot the nominal interest rates for the years 1971 to 1975. Next, use the greenpoints (triangle symbol) to plot the real interest rates for those years.6.05.04.03.02.01.00-1.0 +-2.0-3.0Nominal Interest Rate(Percent)4.54.57.21970OOOOO 1971O 1972O 19738.0O 19746.11971O 1975Inflation Rate(Percent)4.23.36.311.09.119721973YEAR197419751976According to the table, in which year did buyers of six-month Treasury bills receive the highest real return on their investment?ONominal Interest RateAReal Interest Rate(?)

The relationship between the nominal interest rate and the real interest rate can be expressed by…

The following table gives the average nominal interest rates on six-month Treasury bills spanning the years 1971 and 1975, which determined the nominal interest rate paid by the U.S. government when it issued debt in that time period. The table also gives the inflation rate for the years 1971 t 1975. (All rates rounded to the nearest 0.1 percent.) Year 1971 1972 1973 1974 1975 INTEREST RATE (Percent) Source: "FRED Economic Data," Federal Reserve Bank of St. Louis, last modified September 23, 2019, accessed September 24, 2019, https://fred.stlouisfed.org. On the following graph, use the orange points (square symbol) to plot the nominal interest rates for the years 1971 to 1975. Next, use the green points (triangle symbol) to plot the real interest rates for those years. 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0 -1.0 -2.0 -3.0 Nominal Interest Rate Inflation Rate (Percent) 4.5 4.5 7.2 8.0 6.1 1970 OOO O O 1971 O 1972 O 1973 O 1974 1971 O 1975 (Percent) 4.2 3.3 6.3 11.0 9.1 1972 1973 YEAR 1974 According to the table, in which year did buyers of six-month Treasury bills receive the highest real return on their investment? 1975 1976 Nominal Interest Rate Real Interest Rate (?)