connect every red circule to black circule by drawing line and line should not touch eachother it means from every red circule must be draw 3 lines connecting red circules to black circules but the line must not touch each other.[![enter image description here][1]][1]


i am 32 years old now, when i was in 4 class a friend of mine chalanged me to solve this problem and i still couldnt solve it


  [1]: https://i.sstatic.net/qAOOk.png