When applying for health insurance from Health4You, applicants are categorised according to their age, sex, the number of units of alcohol they consume in an average week, Body Mass Index (BMI), whether in full-time work and whether a smoker.
Insurance is offered and the premium is calculated according to the following rules:
Insurance cover is NOT given to those aged 70 or more, or below 18.
Those who consume on average more than 14 units of alcohol a week have an additional premium of £25 per month.
Those with a BMI greater than 35 are NOT given insurance cover.
Smokers have an additional premium of £20 per month.
Those in full-time employment have a premium reduction of £20 per month.
How many test cases are required to give full coverage for the above rules when using a decision table that excludes rules containing infeasible combinations of condition values?