In a clinical trial of 2123 subjects treated with a certain drug, 21 reported headaches. In a control group of 1741 subjects given a placebo, 25 reported headaches. Denoting the proportion of headaches in the treatment group by p Subscript t and denoting the proportion of headaches in the control (placebo) group by p Subscript c, the relative risk is p Subscript t/p Subscript c. The relative risk is a measure of the strength of the effect of the drug treatment. Another such measure is the odds ratio, which is the ratio of the odds in favor of a headache for the treatment group to the odds in favor of a headache for the control (placebo) group, found by evaluating . The relative risk and odds ratios are commonly used in medicine and epidemiological studies. Find the relative risk and odds ratio for the headache data.