There are two stacks of firewood in my backyard, stack A and stack B. For some reason, I want to estimate the difference in mean length of the pieces of wood between the two piles. I randomly sample 21 pieces from stack A which results in a sample mean length of 17.5" with a sample standard deviation of 4.4". A random sample of 23 pieces from stack B yields a sample mean length of 20.2" with a sample standard deviation of 2.5". Use this information to construct a 95% confidence interval for the differences in mean length between firewood pieces in stack A and stack B.Interpret your interval (i.e. what, exactly, does it mean in this case).Round to 4 (four) quality decimal places.