A study indicates that 1a to 24 year olds spend a mean oi 140 minutes watching video on their smartphones per month. Assume that the amount of time watching video on a smartphone per month is normaily distributed and that the standard deviation is 15 minutes. Complete parts (a) through (d) below. (E) [HUUIIU lU IUUI UeLlllli plume: db IIUUUWJ b. What is lhe probability that an 13 to 24yearold spends between 120 and 150 minutes watching video on his or her smartphone per month? The probabiiity that an 18 to 24yeamld spends between 120 and 150 minutes watching video on his or her smartphone per month is 0.6568 . [Round to four decimal places as needed.) c. What is the probability that an 18s to 24yearoid spends more than 150 minutes watching video on his or her smartphone per month? The probability that an 18- to 24-year-old spends more than 150 minutes watching video on his or her smartphone per month is 0.2514 . (Round to four decimal places as needed.) It. Five percent of all 18> to 24yearolds will spend less than how many minutes watching video on his or her smartphone per month? Five percent of all 13- to 24-year-olds will spend less than D minutes watching video on his or her smartphone per month. (Round to two decimal places as needed.)