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According to a study, the probability that a smoker will quit smoking increases with the smoker's educational level. The probability (expressed as a percent) that a smoker with x years of education will quit is approximated by the equation f(x) = 0.831x - 18.1x + 137.3 (for 10 x 16).+ (a) Find f(12). (Round your answer to three decimal places.) f(12) = Interpret this number. [Hint: x = 12 corresponds to a high school graduate.] A smoker who is a high school graduate has a Find f'(12). (Round your answer to three decimal places.) f'(12) = % chance of quitting. Interpret this number. [Hint: x = 12 corresponds to a high school graduate.] When a smoker has a high school diploma, the chance of quitting is ---Select--- at the rate of (b) Find f(16). (Round your answer to three decimal places.) f(16) = Interpret this number. [Hint: x = 16 corresponds to a college graduate.] A smoker who is a college graduate has a % chance of quitting. Find f'(16). (Round your answer to three decimal places.) f'(16) = Interpret this number. [Hint: x = 16 corresponds to a college graduate.] % per year of education. When a smoker has a college diploma, the chance of quitting is ---Select--- at the rate of % per year of education.