Consider the hospital emergency room data displayed below. let a denote the event that a visit is to hospital 4, and let b denote the event that a vist results in lwes (at a hospital). determine the following probabilities. round your answer to three decimal places (e. g. 98.765). hospital total lwbs admitted not admitted 3823 5165 4726 3101 16815 total 192 272 242245 951 1270 1553 662 983 4468 5285 6990 5630 4329 22234 (b) pia b)- pae)