How to divide 3 boards into smaller boards without any waste?

Question

Neil needs to cut 3 long boards into 9 smaller boards. The first is 10ft., the second is 16ft., and the third is 18ft. The smaller boards needed is #3 4ft boards, #4 5ft. boards, #2 6ft boards. How would you make all these small boards using the 3 long boards so there is no waste? 

Answer 1

10ft = 1 6ft, 1 4ft

16ft = 2 5ft, 1 6ft

18ft = 2 5ft, 2 4ft