3) According to the UN, the population of Niger is forecast to have the following exponential growth rates in the years 2060 and 2070: r(2060) = 0.023 and r(2070) = 0.019. If growth rates were constanoe from 2060 to 2070 and also constant from 2070 onwards, what would be the ratio of the population size in 2076 to that in 2060