The Bureau of Labor Statistics announced that in April 2010, of all adult Americans, 139,455,000 were employed,

Question:

The Bureau of Labor Statistics announced that in April 2010, of all adult Americans, 139,455,000 were employed, 15,260,000 were unemployed, and 82,614,000 were not in the labor force. Use this information to calculate:
a. The adult population
b. The labor force
c. The labor-force participation rate
d. The unemployment rate