Explain the meaning of these expected risks and returns, coefficient of variation , and diversification benefits on each portfolio of invesments

Portfolio A:

Expected Returns= 1.1013%

EXPECTED RISKS = 2.1261%

CV = 1.9306

DIVERSIFICATION BENEFIT= -69.5866%

Portfolio B

Expected Returns =1.1863%

EXPECTED RISKS = 1.5504%

CV = 1.3069

DIVERSIFICATION BENEFIT = -29.7392%

Portfolio C

Expected Returns=1.0375%

EXPECTED RISKS = 2.2092%

CV = 2.1294

DIVERSIFICATION BENEFIT= -78.8697%