point(5) possible This question: 1 point(s) possible Submit test A study indicates that 18-10 24-year old spend a mean of 145 minutes watching video on their smartphones per month. Assume that the amount of time watching video on a smartphone per month is normally distributed and that the standard deviation is 15 minutes Complete parts(a) through (d) below a What is the probability that an 18 to 24-year-old spends less than 120 minutes watching video on his or her smartphone per month The probability that an 18-to 24-year-old spends less than 120 minutes watching video on his or her smartphone per month is (Round to four decimal places as needed.) b. What is the probability that an 18-to 24-year-old spends between 120 and 155 minutes watching video on his or her smartphone per month? The probability that an 18-to 24 year old spends between 120 and 155 minutes watching video on his or her smartphone per month is a (Round to four decimal places as needed) c. What is the probability that an 18-to 24-year-old spends more than 15 minutes watching video on his or her smartphone per mont? The probability that an 18-to 24 year old spends more than 155 minutes watching video on his or her smartphone per month (Round to four decimal places as needed) d One percent of all 18 to 24-year-olds will spend less than how many minutes watching video on his or her smartphone per month? One percent of all 18 to 24-year-olds will spend less than 3 minutes watching video on his or her smartphone per month (Round to two decimal places as needed)