$\backslash$table$[[$State of the Economy,Prob,$\backslash$table$[[$Rate of Return of Stock$],[$A$]],\backslash$table$[[$Rate of Return of Stock$],[$B$]]],[$Recession$,0\mathrm{.}35,0\mathrm{.}04,-0\mathrm{.}11],[$Normal$,0\mathrm{.}55,0\mathrm{.}15,0\mathrm{.}19],[$Boom$,0\mathrm{.}10,0\mathrm{.}17,0\mathrm{.}39]]$

a$.$ Calculate the expected return for the two stocks.

b$.$ Calculate the standard deviation for the two stocks.

c$.$ Calculate the expected rate of retum for the portfolio comprising $60$ percent of A and $40$ percent of $B.$