Consider the following data for a particular year when returns were high for portfolio P and market M : Portfolio P Market M Average return $35\%28\%$ Beta $1\mathrm{.}21\mathrm{.}0$ Standard deviation $42\%30\%$ Calculate Sharpe's performance measure $($ reward $-$ to $-$ variability ratio $)$ for the market M$.$ Assume the risk $-$ free rate is $6\%.$ a $0\mathrm{.}69$ b $.236$ c $\mathrm{.}045$ d $.733$ e $.$ None