Elderly wheelchair user study. A sample of 306 wheelchairs users, age 65 or alder, were surveyed about they had an injurious fall during the year and whether their home featured any of 5 selected structural modifications. The responses are summarized in the table below. Home Features All 5 At least 1, but not all None Totals Injurious Fall(s) 2 26 20 48 No Falls 7 162 89 258 Totals 9 188 109 306 a) Find the probability that the wheelchair used had an injurious fall. b) Find the probability that the wheelchair used had all five features installed at home c) Find the probability that the wheelchair used had no falls and none of the features installed at home d) Given no features installed in the home, find the probability of an injurious fall.