求助英语智力题 i saw some ducks yesterday.they were walking to the river.

求助英语智力题 i saw some ducks yesterday.they were walking to the river.
saw some ducks yesterday.they were walking to the river.one baby duck was walking between two baby ducks ,one duck wwas walking behind two baby ducks,but the first duck was walking in front of the three baby ducks.how many ducks did i see yesterday at least?
请将此题翻译一下，看不懂谢谢了