Based on the following information:

$\backslash$table$[[$State of Economy,$\backslash$table$[[$Probability of State$],[$of Economy$]],\backslash$table$[[$Stock A$],[$Rate of Return$]],\backslash$table$[[$Stock B$],[$Rate of Return$]]],[$Recession$,\mathrm{.}20,\mathrm{.}04,-\mathrm{.}20],[$Normal$,\mathrm{.}60,\mathrm{.}08,\mathrm{.}20],[$Boom$,\mathrm{.}20,\mathrm{.}16,\mathrm{.}60]]$

a$.)$ Calculate the expected return and standard deviation for the two stocks.

b$.)$ What is the expected return and variance of a portfolio invested $25\%$ in A and $75\%$ in $B?$