Figure 2

The boundary equilibrium \(\pmb{E_{0}}\) is asymptotically stable with the parameters \(\pmb{a_{1}=1}\) , \(\pmb{a_{2}=1}\) , \(\pmb{b_{1}=0.9}\) , \(\pmb{b_{2}=1}\) , \(\pmb{c_{1}=0.9}\) , \(\pmb{d_{1}=1}\) , \(\pmb{d_{2}=1}\) and \(\pmb{d_{3}=1}\) .