Section DDirections: Read the following passage. After reading it, you should give brief answers to the questions or unfinished statements that follow. The answers should be no more than 3 words.TASK 5Baggage allowances for all sectors (飞机舱位) are:40 kg (88 lbs) for First Class.30 kg (66 lbs) for Second Class.20 kg (44 lbs) for Economy Class.There is no free baggage allowance for infants (婴儿) paying 10% of the adult fare. Excess baggage will be charged at the rate of 1% of the First Class adult one-way fare per kilo.21. How heavy is the baggage which a passenger of Economy Class can carry free of charge?\par ______________________.22. If a passenger of Second Class carries a baggage of 80 kg with him, then how much should he pay for the baggage?\par ______________________ of the First Class adult one-way fare.23. How much free baggage allowance is for infants?\par There is ______________________ baggage allowance for infants.24. How do passengers pay for their excess passage?\par At the ______________________ of the First Class adult one-way fare per kilo.25. What did the short passage mainly discuss?\par Compare baggage allowance for passengers ______________________.