So basically, I want to write a general formula for this: (3,0) (4,1) (5,2) -->meaning that whenver you increase x by 1, x also increases by 1 starting with (0,0)( iguess...). This is to answer this question: Carbon nanotubes with indices (n, m) that satisfy n-m=3l, where l is an integer, behave likemetals (copper, silver, aluminum, etc). The rest behave like semiconductors (silicon, germaniumetc). Can you identify at least one group of vectors that would produce metallic carbon nanotubes?Find as many as you can if you are able to. If anyone knows of anyother group, that would be nice as well. Thank you.