001 10.0 points The oxidation numbers exhibited by man- ganese in the black oxide MnO2 (used in flash- light batteries), the purple permanganate ion MnO4 (an important oxidizing agent) and the unstable deep green manganate ion Mno are 1. +2, +4, and +3, respectively. 2. 2, -4, and -3, respectively. 3. +4, +7, and +6, respectively. 4. -4, -7, and -6, respectively