Directions: Given below is a set of six sentences, which when properly sequenced, form a comprehensible paragraph. The fourth sentence is fixed while the rest of the sentences are jumbled up.  Arrange the sentences in the correct sequence and answer the questions that follow.

A. Harry and his new friends then had to face many challenges throughout their first year.
B. They all quickly became friends.
C. Harry received a letter inviting him to attend Hogwarts.
D. On the train to Hogwarts, Harry met Ron Weasley and Hermione Granger.
E. He learned this from Hagrid, who came to take him to Diagon Alley.
F. Harry was surprised to find out he was a wizard.