The data set "intake" contains baseline information of the Catheter Study. Use the two binary outcomes on whether urinary tract infections (UTIs) and catheter blockages occurred during the last two months to assess

(a) whether catheter blockage is associated with UTI;

(b) the relative risk and odds ratio for UTI with the blockage as a risk factor;

(c) whether catheter blockage and UTI have the same marginal distribution;

(d) agreement as measured by the kappa coefficient.