5. Mr. Tan is a travelling salesman. He has customers in 4 cities A, B, C and D, and is planning a sales trip to visit each of his customers. Mr. Tan needs to start and end the trip at his own town H. Figure below shows the cost of a one-way airline ticket between each pair of cities. If Mr. Tan chooses the route: HABCDH, the travelling cost is 83 + 135 + 71 + 124 + 149 = 562. If he takes the route: HACBDH, the cost is 83 + 69 + 71 + 100 + 149 = 472. What is the cheapest route? II H 83 149 A 102- D 69 135 150 124 70 100 71- B C

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