How to solve

$7.$

$\backslash$table$[[\backslash$table$[[$State of$],[$the world$]],$Probability,$\backslash$table$[[$Security$],[$Returns X$]],\backslash$table$[[$Security$],[$Returns Market$]]],[$Boom$,\mathrm{.}30,\mathrm{.}25,\mathrm{.}15],[$Normal$,\mathrm{.}40,\mathrm{.}07,\mathrm{.}10],[$Resession$,\mathrm{.}30,\mathrm{.}03,\mathrm{.}05],[,,E(R_x)\mathrm{.}112,E(R_{Mf})\mathrm{.}100$