I have a 2 stock portfolio of which I have the expeced returns for each individual stocka nd the standard deviations of each individual stock. We were given 4 different correlations in which to find the standard deviations and I have all of that information too. I'm not stuck on what to do because I don't understand solver.

After finding the variance, covariance, standard deviation, and expected return what else am I supposed to plug into the solver to create the efficient frontier?