Answer:
a. $160 billion in output not produced.
Step-by-step explanation:
Okun law equation
GDP gap = Actual GDP * ((Unemployment rate -Natural rate)/100)*2
GDP gap = $4,000*((8-6)/100)*2
GDP gap = $4,000*(0.02)*2
GDP gap = $4,000*0.04
GDP gap = $160
Therefore, according to Okun's law, the economy would have sacrificed $160 billion in output not produced.