Figure 7: 𝑏 1 = 2 ; 𝛽 1 = 0.4 ; 𝛽 2 = 0.85 ; 𝛽 3 = 0.75 ; 𝛾 ℎ = 0.85 ; 𝜇 V = 0.2 ; = 0.0000001 < 𝛽 𝛿 ℎ