Stock $V$ has a beta coefficient of $2\mathrm{.}0,$ and Stock $W$ has a beta of $0\mathrm{.}5.$ The expected rate of return on an average stock is $11\%,$ and the risk$-$free rate of return is $5$ percent. By how much does the required rate od return on the riskier stock exceed the required return on the less risky stock?