Fig. 4

These panels exhibit families Eqs. (37) and (38) for \(\:\delta\:={10}^{-3}\), \(\:a=0.25\), \(\:\eta\:=0.25\), \(\:\beta\:=0.5\), \(\:{B}_{0}=4\), \(\:{B}_{1}=1.5\), \(\:M=0.5\), \(\:{R}_{f}C=4.{10}^{-4}\): case I (a)–(b) family 1 \(\:\alpha\:=1\), \(\:\alpha\:=0.75\) respectively; (c)–(d) family 2 \(\:\alpha\:=1\), \(\:\alpha\:=0.75\) respectively; (e) 2D graphs for the case I family 1; (f) 2D graphs for the case II family 1.