Which of the following statements about manganate and permanganate ions is correct?
1) Both manganate and permanganate ions are tetrahedral with respect to Mn
2) Manganate ion is tetrahedral with respect to Mn, while permanganate ion is octahedral
3) Manganate ion is octahedral with respect to Mn, while permanganate ion is tetrahedral
4) Both manganate and permanganate ions are octahedral with respect to Mn