The percentage of college freshmen who smoke declined substantially from the year 2004 to the year 2014 and can be modeled by the linear equation

y = -0.461x + 6.32,

where x represents the number of years since 2004. Thus, x = 0 represents 2004, x = 1 represents 2005, and so on, (Source: Higher Education Research Institute, UCLA.)

(a) Use the model to determine the percentage of college freshmen who smoked in the year 2014. Round the answer to the nearest tenth of a percent.

(b) According to the model, in what year did 4.9% of college freshmen smoke?