1) 1탄(비) : https://zep.us/play/25AwLB

2) 2탄(비율) : https://zep.us/play/DKpVGR

3) 3탄(백분율1) : https://zep.us/play/yBYZxw

4) 4탄(백분율2) : https://zep.us/play/2QbVg3