Sub Pop Underground Era (1987-1990)

Sub Pop Underground Era (1987-1990) trivia questions

1. In what month of 1989 was Nirvana's debut album released?
2. Which 1988 single came before Nirvana recorded its debut album?
3. At which Seattle studio was Nirvana's debut album mainly recorded?
4. Between which two months were the main sessions for the 1989 album?
5. Which 1991 Nirvana album's success boosted the 1992 reissue?
6. What U.S. chart did the 1992 reissue reach at No. 89?