Determine the real value of elastic property

Question

Solve the following problem:

Consider the following material called carbon-epoxy with a fiber volume fraction of 70% and E_f = 379 GPa, ν_f = 0.22, Em = 3.3 GPa, and ν_m = 0.35. Compute E₁, E₂, ν₁₂, and G₁₂ using both the rule of mixtures (ROM) and more accurate formulas .

Consider the results and comment on which values are lower or upper bounds to the real value of each elastic property and what seems to be the best model in each case.