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The mean value of land and buildings per acre from a sample of farms is $1300, with a standard deviation of $200. The data set has a bell-shaped distribution. Assume the number of farms in the sample is 78. (a) Use the empirical rule to estimate the number of farms whose land and building values per acre are between $900 and $1700. farms (Round to the nearest whole number as needed.) (b) If 21 additional farms were sampled, about how many of these additional farms would you expect to have land and building values between $900 per acre and $1700 per acre? farms out of 21 (Round to the nearest whole number as needed.) Enter your answer in each of the answer boxes. MacBook Pro