$16.($Finding dominating portfolio$)$ Consider the data for Stock A and Stock B below. A portfolio composed of $90\%$ of Stock A and $10\%$ Stock B has an expected return of $7\mathrm{.}6\%$ and a standard deviation of $20\mathrm{.}78\%.$ Find another portfolio with the same standard deviation and a higher return. What is the proportion of A in the new portfolio? And the proportion of B in the new portfolio? What is the new expected return? What is the portfolio variance?$6$ points