Choose the most appropriate Stata commands to check the normality assumption for the ANOVA model that alms to investigate the effects of repetition and the intervening material on delayed recall. . a. histogram delayscore, by (intmat number) and by intmat number, sort: swilk delayscore . b. histogram delayscore and summarize delayscore, detail c. egen cell = group (intmat number) and robvar delayscore, by (cell) O d. margins number#intmat and by intmat number, sort: summarize delayscore, detail O e. by number, sort: swilk delayscore and histogram delayscore, by (number)