plz help!

(a) Find the t-value such that the area in the right tail is 0.05 with 24 degrees of freedom. (Round to three decimal places as needed.) (b) Find the t-value such that the area in the right tail is 0.01 with 13 degrees of freedom. (Round to three decimal places as needed.) (c) Find the t-value such that the area left of the t-value is 0.10 with 5 degrees of freedom. (Hint: Use symmetry) (Round to three decimal places as needed.) (d) Find the t-value that corresponds to building a 95% confidence interval. Assume 20 degrees of freedom. (Round to three decimal places as needed.)