B. What proportion of human pregnancies last longer than 278 days? (A labeled sketch of the distribution, corresponding shaded areas, and documented calculator commands are required for full credit. Box final answer and round to three decimal places past the decimal.)C.What proportion of human pregnancies last between 260 days and 278 days? (A labeled sketch of the distribution, corresponding shaded areas, and documented calculator commands are required for full credit. Box final answer and round to three decimal places past the decimal.)

b. What proportion of human pregnancies last longer than 278 days? (A labeled sketch of the distribution, corresponding shaded areas, and documented calculator commands are required for full credit. Box final answer and round to three decimal places past the decimal.) (3 points) c. What proportion of human pregnancies last between 260 days and 278 days? (A labeled sketch of the distribution, corresponding shaded areas, and documented calculator commands are required for full credit. Box final answer and round to three decimal places past the decimal.) (3 points) (al goutslugog and isdw 2blow misdiner() (inion !) Snoutsiudog aris al IsnW .6