Calculate the following values with the aid of the rule of 72.

a. If the annual growth rate of real GDP is 4.8% then it will take years for a country's real GDP to double.

b. If the general price level doubles each 46 years the average annual rate of inflation is %.Enter your response rounded to 1 decimal place.

c. If the annual population growth rate is 3.6% then a country's population will double approximately(how many) times in 100 years.Enter your response rounded to a whole number.