The investigators from the previous question have collected some preliminary data from a collaborator. They want to use these data to compare what proportion of people in each treatment group has CD4 count below 200 after one year. The following table shows their observed data: CD4 <200 after 1 year cd4>= 200 after 1 year Total Rifabutin 43 205 248 Rifampin 77 175 252 Total 120 380 500 Fill in the following table with the expected counts, under the null hypothesis that there is no association between ARV regimen and probability of CD4<200 by the end of study cd4 <200 after 1 year>= 200 after 1 year Total Rifabutin 248 Rifampin 252 Total 120 380 500