Let f(x) = 1-3x². Find f(a), f(a+h), and the difference quotient f(a+h)-f(a) where h 0. h Be sure to simplify the difference quotient completely. (Write your final answers for f(a), f(a+h), and the difference quotient (f(a+h)-f(a))/h here on the quiz, and include your work in your File Upload to receive full credit)