Number Employed: 332,500

The number of people employed is the size of labor force minus the amount of people unemployed which is 350,000-17,500 which is 332,500.

_Labor Force Participation Rate: 70%

The labor force participation rate is the amount of people in the labor force over the size of the adult population able to work which is 350,000/500,000=0.7 which is 70%.

Unemployment Rate: 5%

The unemployment rate is the amount of unemployed people over the size of the labor force which is 17,500/350,000=0.05 which is 5%.