11 Use a calcuator With a yx key or a key to solve the following. The exponential function f(x) - models the population of a country, f(x), in milions, x years after 1974. Complete parts (a) - (e). a. Substitute 0 for x and, without using a calculator, fmd the country's population in 1974. The countrys population in 1974 was million 2. he function +20 the percentage of information, that a particular person remembers x weeks afterleaming the hformathn a, Substitute 0 for x and, without using a calculator, find the percentage of remembered at the it is first learned b. I for that I week. c, Find the percentage of information that is remembered after 8 weeks d. Find the of that is remembered after one year (52