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9103) The length of human pregnancies from conception to birth approximate a normal distribution with a mean of 266 days and a standard deviation of 16 days. (i). What proportion of all pregnancies will last less than 240 gl_ays?. $9.1m (Ii). What proportion of all Pf9nanciu will last between 240 and 270 do R between 8 and 9 months)? Y\" \"9"\"? Snln. (iii). What length of time marks the top 10% of all pregnancies? . What I (Iv) ength of time marks the shortest 70% of all pregnancies