2.1 General Relativity 10 Einstein field equation where the Ricci tensor is We calculate the Christoffel symbols from Eq. (2.7). We also calculate the Ricci scalar in Eq. (2.15) from Eq. (2.8). After this work, we obtain what is known as the Friedmann Equation where M$_{P}$ = 2 . 436 × 10 18 GeV is the Reduced Planck Mass , for which 8 πG ≡ M − 2 P in natural units and H ≡ ˙ a a is the Hubble Parameter , with the dot denoting derivative with respect to the cosmic time t . The Hubble pa- rameter is the rate of expansion/contraction of the Universe. For a spatially flat Universe, K =0 and Eq. (2.17) is simply ρ = 3 M 2 $_{P}$H 2 (2.18) H 2 = ρ 3 M 2 P − K a 2 (2.17) R$_{00}$ ≡ R λ 0 λ 0 ≡ ∂$_{0}$ Γ λ 0 λ − ∂$_{λ}$ Γ λ 00 + Γ λ α $_{0}$Γ α 0 λ − Γ λ $_{αλ}$Γ α 00 (2.16) R$_{00}$ − 1 2 g$_{00}$R = 8 πGT$_{00}$ (2.14) R$_{00}$ + 1 2 R = 8 πGρ (2.15)