please answer

A study indicates that 18-to 24-year olds spend a mean of 125 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 105 minutes watching video on his or her smartphone per month? The probability that an 18- to 24-year-old spends less than 105 minutes watching video on his or her smartphone per month is (Round to four decimal places as needed.) 0.0228. b. What is the probability that an 18- to 24-year-old spends between 100 and 180 minutes watching video on his or her smartphone per month? To find tha nehahility that an 18. In 21.vaar.all enande hahunan 1/0 and 10 minute watching vilan on hie or har emarinhona nar manti c. What is the probability that an 18-to 24-year-old spends more than 180 minutes watching video on his or her smartphone per month? alaides juntahing visdon on his or har smartphone per month Is V.1151. d. Five percent of all 18- to 24-year-olds will spend less than how many minutes watching video on his or her smartphone per month