You would like to invest $18,000 and have a portfolio expected return of 12.3 percent. You are considering two securities, A and B.

I need help solving this problem. You would like to invest $18,000 and have a portfolio expected return of 12.3 percent. You are considering two securities, A and B. Stock A has an expected return of 15.6 percent and B has an expected return of 10.3 percent. How much should you invest in stock A if you invest the balance in stock B?