$11.$ The following table shows risk and return measures for two portfolios.

Portfolio Average Annual rate of Return Standard Deviation Beta

A

S&P CNX Nifty $($Market Portfolio$)11\%$

$14\%10\%$

$12\%0\mathrm{.}5$

$1\mathrm{.}0$

$($B$)$ Portfolio A lies on the SML$,$ find the beta of portfolio C which generate $18\%$ rate of return.