9.2.7 Determine the t-value in each of the cases. Click the icon to view the table of areas under the t-distribution. (a) Find the t-value such that the area in the right tail is 0.005 with 8 degrees of freedom. 3.355 (Round to three decimal places as needed.) (b) Find the t-value such that the area in the right tail is 0.20 with 28 degrees of freedom. 0.855 (Round to three decimal places as needed. ) (c) Find the t-value such that the area left of the t-value is 0.02 with 12 degrees of freedom. [Hint: Use symmetry.] (Round to three decimal places as needed.)