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

$\backslash$table$[[,$Stock A$,$Stock B$],[1,0\mathrm{.}11,0\mathrm{.}05],[2,0\mathrm{.}06,0\mathrm{.}03],[3,0\mathrm{.}14,0\mathrm{.}04],[4,-0\mathrm{.}03,0\mathrm{.}03],[5,0\mathrm{.}08,-0\mathrm{.}02]]$

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 $0\mathrm{.}48,$ what is the expected return and standard deviation of a portfolio of $78\%$ stock A and $22\%$ stock B$?$