3 [12 marks] The inside diameter of a piston ring is normally distributed with a mean of 4.5 cm and a standard deviation of 0.005 cm. (a) (b) What is the probability of a diameter exceeding 4.51 cm? What is the probability that a diameter is between 4.49 cm and 4.51 om? [15 marks] [15 marks]

Fig: 1