The capital Asset pricing model $($CAPM$)$ is a financial model that assumes returns on a portfolio are normally distributed. suppose a portfolio has an average annual return of $14\mathrm{.}7\%($i$.$e$.$ an average gain of $14\mathrm{.}7\%)$ with a standard deviation of $33\%.$ A return of $0\%$ means the value of the portfolio doesnt change, a negative return means that the portfolio loses money, and a positive return means that the portfolio gains money. a$.$ what is the probability of this portfolio gaining money between $30\%$ and $50\%?$ b$.$ what is the cutoof for the highest $5\%$of annual returns with this portfolio $($i$.$e$.95$th percentile$)?$