please help.

A B 0.0025 B -0.00124 0.0064 0.0036 0.0006 0.0049 6. Is there enough information in the table above to construct an opportunity set if it is also know that the returns on each one of the stocks are as follows: RA = 5.3%, Ro= 9.4%, and Rc = 8.6% A. Yes, enough information B. No, we also need to know covariances for the top three empty cells C. No, we also need to know variances of each individual stock D. No, not enough information