The annual rate of growth of real GDP in a developing nation is 0.3 percent. Initially, the country's population was stable from year to year. Recently, however, a significant increase in the nation's birthrate has raised the annual rate of population growth to 0.5 percent.

a. What was the rate of growth of per capita real GDP before the increase in population growth?

b. If the rate of growth of real GDP remains unchanged, what is the new rate of growth of per capita real GDP following the increase in the  birthrate?