a. When country invites more expats, it will increase long-run aggregate supply as there will be an increase in labor force which will inturn raise potential GDP.

b. Government raising minimum wage will have no effect on long-run aggregate supply as there is no change in labor force, capital and technology.

c. Intel invents a new and more powerful computer chip will increase the long-run aggregate supply as there is technological advancement.

d. A new virus results in closedown of many companies will decrease long-run aggregate supply as capital and labor force will be not in use.