Please provide detailed explanation and full calculations

Analyzing a Portfolio You have $100, 000 to invest in a portfolio containing Stock X and Stock Y. Your goal is to create a portfolio that has an expected return of 12.9 percent. If Stock X has an expected return of 11.2 percent and a beta of 1.30 and Stock Y has an expected return of 7.7 percent and a beta of .80, how much money will you invest in Stock Y? How do you interpret your answer? What is the beta of your portfolio