The beta of a particular stock is $1\mathrm{.}43$ and the standard deviation of the market returns is $33\%.$ The coefficient of correlation between the returns of the stock and that of the market is $0\mathrm{.}75.$ The real risk$-$free rate is $2\mathrm{.}25\%$ and the expected inflation rate is $1\mathrm{.}15\%.$ What is the standard deviation of the stock's returns