I can't get to the right answer when I try to solve for u. I keep getting 2.7 but they say that the answer is 3.95.

Question 18: (4 points) The distribution of the 2017 calendar year annual return for mutual funds specializing in Canadian energy sector stocks was recorded. Assuming that this distribution is normal, what is the mean and standard deviation of this distribution if 68% of all observations had a return higher than 3.5%, and 95% of all observations had a return lower than 5.5%? Answer 18: Let X denote the 2017 annual return for the Canadian energy mutual funds. We're given that P(X > 3.5%) = 68% (and thus that P(X