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I WILL GIVE BRAINLEST PLS HELP

Phosphorus forms many oxoacids. Indicate the oxidation number of phosphorus in each of the following acids:
(a) HPO3, (b) H3PO2, (c) H3PO3, (d) H3PO4, (e) H4P2O7, (f) H5P3O10.

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Answer:I need it

Explanation: I have the same quision in my chemistry exam but i dont have the answer