OPEN INTERNATIONAL TENDER DOCUMENT AOI No. 040/CUD/PMUD/CSPM/09-2025 OF OCTOBER 1, 2025 FOR THE "UPGRADE OF URBAN ROADS FOR THE BRIDGE OF THE 'BUS RAPID TRANSIT' (BRT) CORRIDOR IN THE CITY OF DOUALA – (12.594 KM)" RESPONSES TO BIDDERS' REQUESTS FOR CLARIFICATION