Figure 4: Numerical simulation of (45) with ; hence (0.347644, 0.0760948, 0.0760948, 4.51674, 0.330353, 0.0765909, 0.0765909, 4.4678) is globally stable. Graphs (a) and (b) illustrate that , and will eventually towards to steady state. Graphs (c) and (d) illustrate that , and will eventually towards to steady state. Initial values are , and .