A financial advisor is recommending a portfolio consisting of two stocks, Stock A and Stock B. The expected return and standard deviation for each stock is given below:

Stock A: Expected return: 12% Standard deviation: 15%

Stock B: Expected return: 10% Standard deviation: 20%

The financial advisor wants to achieve a portfolio expected return of 11% and a portfolio standard deviation of 18%. Calculate the weights of Stock A and Stock B in the portfolio. (10 marks)