$2\mathrm{.}37$ Portfolio return: A portfolio's value increases by $\backslash (17\backslash \%\backslash )$ during a financial boom and by $\backslash (8\backslash \%\backslash )$ during normal times. it decreases by $\backslash (13\backslash \%\backslash )$ during. a recession. What is the expected return on this portfolio if each scenario is eauallv likely $($that is each scenario has probability equal to $1/3)?6($round to the nearest whole percent$)$