{3} Bi(7)_bends_1.gif Bi(7)_bends_2.gif Bi(7)_bends_3.gif Bi(7)_bends_4.gif Bi(7)_bends_5.gif
{4} Bi(7)_bends_6.gif Bi(7)_bends_7.gif Bi(7)_bends_8.gif Bi(7)_bends_9.gif Bi(7)_bends_10.gif
{3, 4} Bi(7)_bends_11.gif Bi(7)_bends_12.gif Bi(7)_bends_13.gif Bi(7)_bends_14.gif
Created with the Wolfram Language