Figure 5

Evolution of i and \(R_{i}\) for: (a) different values of ϵ with \(\alpha =0.56\), \(\gamma =0.3\), \(\sigma _{1}=0.1\), \(\sigma _{2}=0.3\), \(\delta =0.2\), \(\beta =0.4\), (b) different values of \(\sigma _{2}\) with \(\epsilon =0.28\), \(\alpha =0.56\), \(\gamma =0.3\), \(\sigma _{1}=0.1\), \(\delta =0.33\), \(\beta =0.4\), (c) different values of γ with \(\epsilon =0.28\), \(\alpha =0.56\), \(\sigma _{1}=0.1\), \(\sigma _{2}=0.3\), \(\delta =0.2\), \(\beta =0.4\)