Shugabannin Najeriya nawa ne suka rasu tun bayan samun ƴanci?

Bayan rasuwar tsohon shugaban Najeriya Muhammadu Buhari a ranar 13 ga watan Yulin 2025, BBC ta duba tare da kawo bayanai game tsofaffin shugabannin ƙasar da suka rasu da kuma dalilan mutuwarsu.