For parts a and b, use the t tables, software, or a calculator to estimate. For parts c and d, use software or a calculator to estimate. a) the critical value of t for a 99% confidence interval with df = 11. b) the critical value of t for a 95% confidence interval with df = 49. c) the P-value for t2 2.58 with 5 degrees of freedom. d) the P-value for |t| > 1.66 with 30 degrees of freedom. Click the icon to view the t table. a) What is the critical value of t for a 99% confidence interval with df = 11? (Round to two decimal places as needed.) b) What is the critical value of t for a 95% confidence interval with df = 49? (Round to two decimal places as needed.) c) What is the P-value for t2 2.58 with 5 degrees of freedom? (Round to three decimal places as needed.) d) What is the P-value for |t| > 1.66 with 30 degrees of freedom? (Round to three decimal places as needed.)