Standard deviation question statistics best answer 10 points!?

he length of a Colorado brook trout is normally distributed.





(a) What is the probability that a brook trout’s length exceeds the mean?





(b) Exceeds the mean by at least 1 standard deviation?





(c) Exceeds the mean by at least 2 standard deviations?


(d) Is within 2 standard deviations?


Show your work clearly.

Standard deviation question statistics best answer 10 points!?
Don't know the probability, but here are the percentages in the population





a)50%





b)15.%





c)2.2%





6)64%