Find the smallest standard deviation

Question 3 Which of the following sets of four numbers has the smallest standard deviation? O A. 0, 0, 10, 10 O B. 5, 5, 5, 6 O C. 0, 1, 2, 3 O D. 7. 8, 9, 10Question 1 10 pts In large-scale tree-felling operations, a machine cuts down trees, strips off the branches and then cuts the trunks into logs of length X feet for transporting to a sawmill. It may be assumed that values of X are normally distributed with mean = 3 feet and a standard deviation of 0.50 feet. A cut log is randomly selected. Calculate the following probabilities, Round your final answers to four decimal places. (a) The log is less than 2 feet (b) The log is exactly 3.5 feet (c) The log is between 2 and 5 feet (d) The log is more than 3.5 feet (e] The log is either more than 3.5 feet or less than 2 feet (f) Log lengths in the top 10% of the distribution are deemed a driving hazard. What is the shortest log length that would deem a log a driving hazard