Write empirical formula

Answer:
[tex]Pb (MnO_{4})_{4}\\Pb (CH_{3}CO_{2})_{4}\\\\NH_{4}MnO_{4}\\NH_{4}CH_{3}CO_{2}[/tex]
Explanation:
[tex]Pb^{4+} (MnO_{4}^{-})_{4}--->Pb (MnO_{4})_{4}\\Pb^{4+} (CH_{3}CO_{2}^{-})_{4}--->Pb (CH_{3}CO_{2})_{4}\\\\NH_{4}^{+}(MnO_{4}^{-})--->NH_{4}MnO_{4}\\NH_{4}^{+}(CH_{3}CO_{2}^{-})--->NH_{4}CH_{3}CO_{2}[/tex]