Using extended Whitman's risk formula, $($a$)$ calculate risk R and $($b$)$ assess the risk with a meaning of the value, R$.($c$)$ Do you need to improve the controls?

Asset A has a value of $100$ and has a vulnerability, which has a likelihood of $0\mathrm{.}5$ with a current control that addresses $50\%$ of its risk. Your assumptions and data are $90\%$ accurate.