Question: when was the next coach appointed after Niger Tornadoes fired their coach?
SQL: SELECT "Date of appointment" FROM "1-28164986-4" WHERE "Manner of departure" = 'fired' AND "Team" = 'Niger Tornadoes';

Question: how many managers left Sunshine Stars?
SQL: SELECT COUNT("Outgoing manager") FROM "1-28164986-4" WHERE "Team" = 'Sunshine Stars';

Question: how many new managers replaced  manager(s) who Resigned? 
SQL: SELECT COUNT("Incoming manager") FROM "1-28164986-4" WHERE "Manner of departure" = 'Resigned';

Question: how many times did Tunde Abdulrahman leave the team?
SQL: SELECT COUNT("Date of vacancy") FROM "1-28164986-4" WHERE "Outgoing manager" = 'Tunde Abdulrahman';