[Grammar] affect / affect on

[wotcha]

1) The price of oil can negatively affect on a business.
2) The price of oil can negatively affect a business.
3) The price of oil can negatively have an effect on a business.

Which is/are correct?

 

[jcrunker]

2 is corrrect
no.1 & no.2 are gramatically wrong

 

[5jj]

1) [STRIKE]The price of oil can negatively affect on a business. [/STRIKE]
2) The price of oil can negatively affect a business. :tick:
3) The price of oil can [STRIKE]negatively[/STRIKE] have a[STRIKE]n[/STRIKE] negative effect on a business. :tick: (revised version

5