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American adults spend an average of 11 (standard deviation of 2.5 hours) hours per day watching, reading, listening to or simply interacting with media, according to a new study by market-research group Nielsen. A US adult is randomly selected, what is the probability that:
(a) The person spends less than 16 hours?
(b) The person spends more than 6 hours?
(c) The person spends between 4 hours and 15 hours?
(d) The person spends less than 3 or more than 15 hours?
(e) The person spends exactly 10 hours?
(f) People in the top 2.5% of the distribution of time spent interacting with social media are considered addicted to the internet. What is the minimum amount of time a person can spend online in order to be consider addicted to the internet?
(g) In a certain company, employees who spend more than 5% of the time on non-company-related internet activities receive warnings, which could affect their year-end bonuses. What is the most amount of time an employee can spend on non-company-related internet activities and not receive a warning?

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