Stocks A and B have the following returns: $($Click on the following icon $$ in order to copy its contents into a spreadsheet.$)$

a$.$ What are the expected returns of the two stocks?

b$.$ What are the standard deviations of the returns of the two stocks?

c$.$ If their correlation is $0\mathrm{.}47,$ what is the expected return and standard deviation of a portfolio of $80\%$ stock A and $20\%$ stock B$?$