A study indicates that 18-10 24-year olds spend a mean of 140 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 20 minutes. Complete parts (6) through (d) below. a What is the probability that an 18-60 24-year-old spends less than 10 minutes watching video on his or her smartphone per month? The probability that an 18 to 24-year-old spends less than 10 minutes watching video on his or her smartphone per month is 0401 (Round to four decimal places as needed) b. What is the probability that an 18 to 24-year old spends between 105 and 160 minutes watching video on his or her smartphone per month? The probability that an 18 to 24 year old spends between 105 and 160 minutes watching video on his or her smartphone per months 8013 (Round to four decimal places as needed c. What is the probability that an 18-10 24 year old spends more than 100 minutes watching video on his or her wartphone per month? The probability that an 18-to 24 year old spends more than 100 minutes watching video on his or her smartphone per month II (Round to four decimal places as needed)