Fig. 3

\(f^{\prime}(\eta )\) versus \({\psi _2}\). Taking \(\varpi =0.3\), \({\psi _1}=0.03\), \(m=0.1\), \({S_c}=1.2\), \({N_r}=1.1\), \({{\text{B}}_{\text{i}}}=0.22\), \({K_r}=0.1\), \({K_s}=0.2.\)

\(f^{\prime}(\eta )\) versus \({\psi _2}\). Taking \(\varpi =0.3\), \({\psi _1}=0.03\), \(m=0.1\), \({S_c}=1.2\), \({N_r}=1.1\), \({{\text{B}}_{\text{i}}}=0.22\), \({K_r}=0.1\), \({K_s}=0.2.\)