Hello, I have this exercise from my Investment class with the answers but I need to know the procedure of how to reach those results. Could you help me? Thank you.

I only have the information I provide

Q4 The following information pertain to MM Company and two indexes Year Rate of return for MM Com. Proxy Index General Index 20x1 20X2 20x3 20x4 Average Variance St. Dev. 75.5 8.6891 8.3066 8.0000 Cov (MM, Index) Corr coff Beta 0.9698 1.0145 68 0.9782 1.0625