Annual energy generation from wind (in million megawatt-hours) can be approximated by the function f(x) = - 335.8 + 193.7 In x, where x = 6 corresponds to the year 2006. Assuming that the model remains accurate, find the first full year in which the wind power exceeds the following values. (a) 254 million megawatt-hours (b) 309 million megawatt-hours (a) The first full year in which the wind power exceeds 254 million megawatt-hours is 4 (Type a whole number.)