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I.... suck at Sudoku, but am looking to have a puzzle done for a friend of mine. Can you all take a look at this and solve it?

The only thing I can say initially is that it must be a somewhat easy puzzle, since you obviously don't have to put only one of each number in the diagonals. I say obviously because there are two 1's in the top-right to bottom-left diagonal, and no way to put a 7 on that diagonal.

Or if you just want the highlighted squares: 8, 6, 3 respectively.

You guys rock. Thanks!

Edit: I really should learn Sudoku.