有两种材料制成的体积相同的甲乙实心球，当在天平右盘中放入2个甲球，在天平左盘中放入3个乙球时，天平恰好平衡，则ρ_甲：ρ_乙为（　　）

A．3：2

B．2：3

C．1：1

D．9：4

Anh’s car required repairs to its steering. She took the car to Repair Limited, a local garage, to have the necessary work completed. Immediately after collecting the car, Anh was driving to the airport in order to travel to Paris on business and the steering on the car failed. As a result, Anh damaged a building adjacent to the road. The subsequent discussions with the owner of the building and the police who attended the accident delayed Anh’s onward journey, causing her to miss the flight. Anh had to pay for a new ticket.Required:

(b) Discuss the extent of liability facing Anh, Repair Limited and the engineer who repaired the steering wheel on behalf of Repair Limited. (6 marks)