Question 4 {1 point) A school of 200 bottle nose dolphins is living in a protected environment. The life expectancy of the dolphins is normally distributed, with a mean of 38 years and a standard deviation of 3.5 years. Determine the number of dolphins that can be expected to live less than 31 years. :1 A Question 5 {1 point) On the January Math 20-2 Final Exam, the mean and standard deviation were 72% and 13.1% and John scored a mark of 86%. On the June Math 20-2 Final Exam, the mean and standard deviation were 72% and 11.9% and Mark scored a mark of 86%. Who did better on their exam relative to her peers? Q/