there is 6 parts to this question in 3 pictures

Smartphones: A poll agency reports that 48% of teenagers aged 12-17 own smartphones. A random sample of 150 teenagers is drawn. Round your answers to at least four decimal places as needed. (a) Find the mean \"A. P The mean is . H; [:1 (b) Find the standard deviation 6?. The standard deviation GA is . ,, D (c) Find the probability that more than 50% of the sampled teenagers own a smartphone. The probability that more than 50% of the sampled teenagers own a smartphone is D. [:1 (d) Find the probability that the proportion of the sampled teenagers who own a smartphone is between 0.45 and 0.55. 111e probability that the proportion of the sampled teenagers who own a smartphone is between 0.45 and 0.55 is [:j. (e) Find the probability that less than 55% of sampled teenagers own smartphones. The probability that less than 55% of sampled teenagers own smartphones is E]. [:1 (f) Would it be unusual if less than 40% of the sampled teenagers owned smartphones? It (Choose one) V be unusual if less than 40% of the sampled teenagers owned smartphones, since the probability is E]