structure correction!

[thinley]

The chief editorial concern in magazine publishing is presenting a mix of news, information, and entertain, all target at the audience magazine seeks to reach.

Can some one point out which one is wrong among the four underline words. I feel entertain should be entertainment.

[Tdol]

I agree. I also think 'target' should be in the past participle form and there should be a definite article between audience and magazine.