Hello may I please have help with this question? Thank you

The Centers for Disease Control and Prevention reported that there were 443, 000 smoking-related deaths in the U.S. in a recent year. The numbers of deaths caused by various illnesses attributed to smoking are as follow Illness Number Lung Cancer 128, 900 Ischemic heart disease 126, 000 Chronic obstructive pulmonary disease 92, 900 Other 95, 200 Total 443, 000 a. What is the probability that a smoking-related death was the result of lung cancer? b. What is the probability that a smoking-related death was the result of either ischemic heart disease or other