Question 10 The length, in cm, of a plank of wood has a normal distribution with mean u and variance 02. It is found that 16% of the pipes exceed 15 cm and that 15% of the pipes are less than 14 cm. (i) Find the values of p and 02 The plank of wood required to repair a section of fence must be more than 15.6 cm. (ii) Calculate the percentage of wooden planks that will be long enough for the repair.