An article in Fire Technology investigated two different foam expanding agents that can be used in the nozzles of fire-fighting spray equipment. A random sample of five observations with an aqueous film-forming foam (AFFF) had a sample mean of = 4.7 and a standard deviation of s1 = 0.6. A random sample of five observations with alcohol-type concentrates (ATC) had a sample mean of 2 = 6.9 and a standard deviation 82 = 0.8. Construct a 95% confidence interval for Then, provide the numerical value of the Lower Confidence Limit (LCL). Round your final answer to 4 decimal places. Assume that both populations are well represented by Normal distributions.

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