YouTube is a popular destination on the internet; let's look at how YouTube usage is distributed among age groups. According to the Pew Internet and American Life Project, about 70% of internet users aged 18-29 have visited YouTube, along with 51% of those aged 30-49 and 26% of those 50 or older. About 30% of adult internet users are 18-29 years old, another 45% are 30-49, and the remaining 25% are 50 and over.(a) Calculate the probability that a randomly selected internet user has used YouTube.(b) If we randomly select a YouTube internet user, what is the probability they are aged 18-29?

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