A manufacturer of LED light bulbs claims that the lives of its bulbs are normally distributed with mean 50 000 hours and a standard deviation of 2600 hours. In a batch of 800 bulbs, how many should last longer than 45 000 hours? For this calculation Z = (Write your answer correct to 2 decimal places). The proportion of LED light bulbs that should last longer than 45 000 hours is (Write your answer correct to 4 decimal places). Of the 800 bulbs in the batch, answer to the nearest whole number} should last longer than 45 000 hours. (Write your To assist in answering this question, Standard Normal Probabilities are given below. Recall that Z = x-pl Standard Normal Probabilities for Negative Z-scores