After 20 years of follow-up, 5% of those who regularly went to the sunbed had been diagnosed with melanoma, while only 2% of those who never went to the sunbed were diagnosed with melanoma.

a) How many individuals were diagnosed with melanoma during the study period (total in both groups)?

b) What are the odds of a person being regularly diagnosed with melanoma? The answer with two decimal places.

c) What are the odds that a person who was never diagnosed will be diagnosed with melanoma?

d) What is the odds ratio of a person who was regularly diagnosed with melanoma compared to those who were never diagnosed?