In the "Implications for public health" the researchers suggest various steps that could be taken to prevent bystanders from drowning when attempting a rescue. (They use the term bystander even when referring to people who attempted to rescue family members. They mean the rescuer was not involved in the swimming activity at the time.) Ignore the suggestions about learning resuscitation and first aid, which is what the researchers think could be done as part of drivers' licence renewals. This is also what they mean by 'tertiary prevention'. In you r own words, guided by your examination of the data and drawing on the ideas the researchers put forward, summarise the main steps that could be taken to prevent people from drowning when attempting to rescue another person (or animal). What could be done? Who should be the focus? When and where should efforts be made?