The mean (average) lifetime of light bulbs produced by Ali is 7 = 3,000 hours with a standard deviation S= 700 hours. Use Chebyshev's theorem and the empirienl rule (where appropriate) to answer the following questions. The mean (average) lifetime of light bulbs produced by Ali is = 3,000 hours with a standard deviation S-700 hours. Use Chebyshev's theorem and the empirical rule (where appropriate) to answer the following questions. a. What fraction of light bulbs have a lifetime between 1,600 and 4,400 hours? Note that no information is given about the shape of the distribution. Show your work. b. How does your answer to part (a) change if the distribution is bell-shaped? Show your work by drawing a bell-shaped distribution that includes your answer. c. What fraction of light bulbs have a lifetime between 900 and 5,100 hours? Note that no information is given about the shape of the distribution. Show your work. d. How does your answer to part (e) change if the distribution is bell-shaped? Show your work by drawing a bell-shaped distribution that includes your answer.