1. 根据方框内容. 回答下列问题。

Welcome to the zoo Opening; from Monday to Friday                Fee(费用) 10:00 am — 6:00 pm                         Adult: $10, 00 from Saturday to Sunday                       Ages 13—15: $ 7.50 9:00am — 8:00pm                            Ages4—12: $5.00 Try out Train Ride for $ 2. 00 one person        Under 4: Free

1. （1） What time does the zoo close on Saturdays? (不超过3个词)
3. （2） How many days in a week does the goo open? (不超过2个词)
5. （3） Mrs. Chen and her son Bob go to the Z00. Bob is three years old. How much do they pay? (不超过1个词)