The following data come from a clinical trial comparing two therapies - standard treatment and new treatment - for advanced AIDS patients. The new treatment is designed to prevent a drop in CD4 count. All patients had acceptable CD4 counts (i.e. not low) at the start of study. Table 8 shows patient status after 12 months of treatment. Assume no loss to follow-up. Table 8 Low CD4 count Therapy Yes No Standard 48 14 New 24 42 33. Compute the risk difference and number needed to treat comparing new treatment to standard (use standard therapy as the reference group, and "Low CD4 Count"="Yes" as the outcome). For the purposes of this question, round the NNT to two decimal places