3. [a] Today cargo moves between more than 3,000 major commercial ports, and to understand the economic mechanisms which drives this complex operation we need to know "where" goods move and "why". Using the World map provided, Mark and Name the following; I. The St. Lawrence seaway, Gulf of Mexico and Gulf of Aden. II. The three dominating economic centres. III. A major port at each dominating economic centre. IV. Suez Canal, Panama Canal and Malacca Strait. V. Mediterranean Sea, Baltic Sea and Arabian Sea. VI Two bunkering port, Two Coal producing area and Antarctica region. (3marks) (3marks) (3marks) (3marks) (3marks) (5marks) [b] Explain the main function of shipping. (3marks) [c] Explain the concept of value added to seaborne transport. (4marks) [a] Discuss four main roles of Classification societies in ensuring that ships are seaworthy . (16marks)