已知正方形 $\mathit{ABCD}$的边长为1，当每个 ${\lambda }_i(i=1,2,3,4,5,6)$取遍 $\pm 1$时， $\left|{\lambda }_1\stackrel{⃑}{\mathit{AB}}+{\lambda }_2\stackrel{⃑}{\mathit{BC}}+{\lambda }_3\stackrel{⃑}{\mathit{CD}}+{\lambda }_4\stackrel{⃑}{\mathit{DA}}+{\lambda }_5\stackrel{⃑}{\mathit{AC}}+{\lambda }_6\stackrel{⃑}{\mathit{BD}}\right|$的最小值是________；最大值是_______.