Researchers have been interested in the risk of knee osteoarthritis in former professional sportspeople. The following questions relate to a series of studies undertaken on a study sample of 1000 retired male and female professional sportspeople aged 45-55 years in Australia in 2015. 1. An initial study was undertaken to establish the extent of knee osteoarthritis present in the study sample. The study identified 104 sportspeople with knee osteoarthritis based on X-ray examination. Please calculate the point prevalence and interpret your result. 2. Based on the findings of the above study researchers decided to run a follow-up study for 5 years. In 2020, all 1,000 sportspeople were assessed at a second health check and a further 93 had developed knee osteoarthrosis. What was the cumulative incidence of knee osteoarthrosis among this study sample after 5 years of follow-up? Please interpret your result. 3. What was the point prevalence of knee osteoarthritis at the second assessment? Please interpret your result