Use the given information to find the number of degrees of freedom, the critical values chi Subscript Upper L Superscript 2 and chi Subscript Upper R Superscript 2, and the confidence interval estimate of sigma. It is reasonable to assume that a simple random sample has been selected from a population with a normal distribution. Nicotine in menthol cigarettes 90% confidence; nequals29, sequals0.23 mg. LOADING... Click the icon to view the table of Chi-Square critical values. Question content area bottom Part 1 dfequals 28 (Type a whole number.) Part 2 chi Subscript Upper L Superscript 2equals 16.928 (Round to three decimal places as needed.) Part 3 chi Subscript Upper R Superscript 2equals enter your response here (Round to three decimal places as needed