Determine (a) the x2 test statistic, (b) the degrees of freedom, (c) the critical value using a = 0.05 and (d) test the hypotheses at the a=0.05 level of significance. A B C D Expected 10 9 11 10 Observed 10 10 10 10 Ho: Pa=Pb=Pc=Pd=1/4 H1: At least one of the proportions is different from the others (Show work please)