Figure 17-4 Refer to Figure 17-4. Consider the shift in the short-run Phillips curves shown in the above graph. This shift may be explained by Group of answer choices an increase in the expected rate of inflation from 4.0 to 5.5 percent. either an increase in the natural rate of unemployment from 5.0 to 6.2 percent or an increase in the expected rate of inflation from 4.0 to 5.5 percent. an increase in the natural rate of unemployment from 5.0 to 6.2 percent. None of the above is correct