Applications take about 1-3 months to be processed. After the application has been approved by the Aliens' Authority the Consulate will issue a residence permit in the form of a visa.
Any person he/she who has a valid passport can apply for the visa.
Both categories are being applied for Equatorial Guinea visas, you can choose between plans for single entry or multiple entries.
Yes, you have to do this process because your visa will be checked on different platforms and by different officers in paperback form.