The following data is available relating to the performance of a hedge fund and the market portfolio. The risk$-$free rate of return during the sample period was $4\mathrm{.}51\%.$ What is the Jensen measure of performance evaluation $($in percentage$)$ for the hedge fund?

$\backslash$table$[[,$Hedge Fund,Market Portfolio$],[$Average return,$21\mathrm{.}81\%,6\mathrm{.}28\%$