When performing a 2 test for independence in a contingency table with r rows and c columns, determine the upper-tail critical value of the 2

When performing a χ2 test for independence in a contingency table with r rows and c columns, determine the upper-tail critical value of the χ2 test statistic in each of the following circumstances.

a. α = 0.05, r = 4 rows, c = 5 columns

b. α = 0.10, r = 4 rows, c = 5 columns

c. α = 0.01, r = 5 rows, c = 4 columns

d. α = 0.05, r = 3 rows, c = 6 columns

e. α = 0.01, r = 2 rows, c = 5 columns