Using the implied views method, the expected return on the U$.$S$.$ stock market was found to be $8\mathrm{.}5\%,$ the expected return on the U$.$S$.$ bond market was $4\mathrm{.}0\%,$ and the expected return on a third aset was $2\mathrm{.}50\%.$ Thier betas with respect to the benchmark allocation used in the analysis were $0\mathrm{.}80,0\mathrm{.}25,$ and $0\mathrm{.}00,$ respectively.What was the expected return on the benchmark portfolio?