An economy is estimated to be experiencing a 2.5% rate of frictional unemployment plus a 3.5% rate of structural and real-wage unemployment. If it is also experiencing cyclical unemployment of 5.0%, its natural rate of unemployment is most likely to be:
2.5%2.5\%2.5%
6.0%6.0\%6.0%
8.5%8.5\%8.5%
11.0%11.0\%11.0%