1. The problem statement, all variables and given/known data c. The life of a certain brand of battery is normally distributed with a mean of 4 years and a standard deviation of 1. 2 years. i. If a battery is selected at random, what is the probability that it will last for more than 6 years? (5 marks) ii. How long a warranty period should the manufacturer provide if he is willing to replace at most 5% of all the batteries sold? (5 marks) 2. Relevant equations 3. The attempt at a solution Part (i) i can do. Part (ii) dun understand. 5% of all batteries sold? how many are they?