i/_= \\I 4 5 6 7 8 9 10 11 12 13 K. J ||| .n 'II N Smartphones: A poll agencyf reports that 64% of teenagers aged 1.21? own smartphones. A random sample of 65 teenagers is drawn. Round your answers to at least four decimal places as needed. Part 1 of6 (a) Find the mean IJA. D The mean 11A is I I p ' X 53 Part 2 of6 [b] Find the standard deviation (in. p The standard deviation GA is . g ' x a Part 3 of6 (c) Find the probability that more than 66 % of the sampled teenagers own a smartphone. The probability that more than 66% of the sampled teenagers own a smartphone is I I. (d) Find the probability that the proportion of the sampled teenagers who own a smartphone is between 0.61 and 0.75. The probability that the proportion of the sampled teenagers who own a smartphone is between 0.61 and 0.727. is Part 5 of6 {e} Find the probability that less than 73% of sampled teenagers own smar'tphones. The probability that less than 75% of sampled teenagers own smartphohes is | |. Part: 5 I 6 Part 5 of 6 [f] Would it be unusual if less than 60% of the sampled teenagers owned smartphones? It|[Choose one} 1' I be unusual if less than 50% of the sampled teenagers owned smar'tphones, since the probability is