There should be three answers please

21. If the government wants to increase spending on public works by $100 billion to stimulate the economy without increasing inflation, it would decrease taxes by $100 billion. increase taxes by $100 billion. decrease taxes by less than $100 billion. increase taxes by less than $100 billion. increase taxes by more than $100 billion. 22. If the Federal Reserve conducts an open market purchase, we can expect that the short-run Phillips curve will shift left. the short-run Phillips curve will shift right. there will be a movement to the right along the short-run Phillips curve. there will be a movement to the left along the short-run Phillips curve. the long-run Phillips curve will shift right. 23. The long-run Phillips curve is down sloping at the full employment level of production. up sloping at the full employment level of production horizontal at the full employment level of production. vertical at the full employment level of production. up sloping at the real GDP level of production