Hi, please show your work so I understand and please write clearly. There is no need to rush -- thank you

The life span of LED light bulbs is normally distributed with a mean and a standard deviation equal to 6'30 and l hours, respectively. The life span of uorescent light bulbs is normally distributed with a mean and a standard deviation equal to Still) and 8t] hours1 respectively. e} The manager of the company which produces LED light bulbs has determined that the proportion of LED light bulbs that have a life span change is thirty ve percent. If a sample of EDD LED light bulbs is selected at random, what is the probability that less than forty percent of the LED light bulbs are with a changed life span