I would appreciate a better explanation on how to get the answer with these 2 questions. I have been back and forth through the book and it has been very confusing. Thanks for the help

Chapter 12

P6 -Find the real return on the following investments:

Stock	Nominal Return	Inflation
A	10%	3%
B	15%	8%
C	-5%	2%

P8: The countries of Stabilato and Variato have the following average returns and standard deviations for their stocks, bond, and short-term government securities. What range of returns should you expect to earn 95 percent of the time for each asset class if you invested in Stabilato