any help would be greatly appreciated

13 The mean useful life of car batteries Is 52 months. They have a standard deviation of 5. Assume the useful life of batteries Is normally distributed 214 a. Calculate the percent of batteries with a useful life of less than 42 months. (Round your answer to the nearest hundredth percent) points b. Calculate the percent of batteries that will last longer than 57 months, (Round your answer to the nearest hundredth percent) Answer is complete but not entirely correct. Percent of batteries 2.50 % b Percent of batteries 0.15 X3%