Please show steps

Assume you create a portfolio that combines Stock A (return of 10% and a standard deviation of 20% ) with Stock B (return of 16% and standard deviation of 40%, and the portfolio has a return of 11.74%. How much of the portfolio is in stock A and how much is in stock B? wA=29% and wB=71% WA=43% and WB=57% WA=57% and WB=43% WA=71% and WB=29%