4. {10 points} Consider the inflation and unemployment data in the table below for the United States between 1666 and 2665. Natural Rate Unemployment Unemployment Year U Un Ination 1999 5.6 6.1 5.4 1991 6.6 6.4 4.2 1992 15 6.5 3.6 1993 6.6 6.4 3.6 1994 6.1 6.2 2.6 1995 5.6 5.6 2.6 1999 5.4 5.4 3.6 199? 4.6 5.6 2.3 1999 4.5 4.6 1.6 1999 4.2 4.6 2.2 2999 4.6 4.6 3.4 2991 4.? 4.6 2.6 2992 5.6 4.9 1.6 2993 6.6 5.6 2.3 2994 5.5 5.1 2.? 2995 5.1 5.2 3.4 Assuming Dkun's Law holds true [i.e. 196 of unemployment is approximately equal to 2% of lost output}, using the data ah'e, calculate the sacrifice ratio for the US economy between the 1696-2665 period. Based on your answer, can you say anything about whether people in the economy form expectations based on rational expectations or adaptive expectations