What is the estimated life expectancy for a 64 year old male who has been diagnosed with COPD, takes blood pressure medication, has smoked cigarettes for 50 years but quit recently, has a history of alcoholism but now drinks socially, smokes crack cocaine weekly, injects intravenous opioids (crushed dilaudid pills, no street heroin) several times a week, is prescribed 80mg Oxycontin, 3mg Xanax, and 30mg Percocet daily, is a T11 paraplegic, has a stage 4 decubitous ulcer, who rarely exercises,