You are testing a simplified apartment search form which has only two search criteria:  floor (with three possible options: ground floor; first floor; second or higher floor)  garden type (with three possible options: no garden; small garden; large garden) Only apartments on the ground floor have gardens. The form has a built-in validation mechanism that will not allow you to use the search criteria which violate this rule. Each test has two input values: floor and garden type. You want to apply equivalence partitioning (EP) to cover each floor and each garden type in your tests. What is the minimal number of test cases to achieve 100% EP coverage?