Students in Mrs. Palmer's third grade class are working on times tables, and they demonstrate mastery by passing tests. Evan has passed 12 tests so far. His classmate, Ann, has passed 2 tests of them. From now on, Evan plans to take and pass 4 tests per week. Meanwhile, Ann plans to do 5 per week. At some point, Evan will catch up to Ann. How long will it take? How many tests will each child have passed?