11.21When performing ax2 test of independence in a contingency table withrrows andccolumns, determine the upper-tail critical value of the test statistic in each of the following circumstances:
A.a= 0.05,r =4 rows,c= 5 columns
B.a= 0.01,r =4 rows,c= 5 columns
C.a= 0.01,r =4 rows,c= 6 columns
D.a= 0.01,r =3 rows,c= 6 columns
E.a= 0.01,r =6 rows,c= 3 columns