Below are Earned Run Averages for the indicated Leagues. Assume that all distributions are normal. Note: the lower an Earned Run Average is, the better (more impressive) it is. (a) Rank Koufax, Maddux, and Martinez in impressiveness relative to their respective Leagues. (b) What would Koufax's Earned Run Average have to have been in 1963 for his performance to have been exactly as impressive as was Martinez' in 1999? (c) What would a pitcher's Earned Run Average have to have been in 1999 to have been in the lowest 2% of Earned Run Averages