The population of a country was 5.117 million in 1990. The approximate growth rate of the country's population is given by f() 0,07956935 . 00156 corresponds to 1990, where t 0 a. Find a function that gives the population of the country (in milions) in year t. b. Estimate the country's population in 2015. a. What is the function F()? F(1) -D (Simplify your answer. Use integers or decimals for any numbers in the expression. Round to five decimal places as needed.) %3D st