Compound A has a molecular formula of C5H12O and is oxidized by an acidic solution of sodium dichromate to give compound B, whose molecular formula H5SO4 is When compound A is heated with C and D are obtained. Considerably more D is obtained than C. Compound C reacts with O3 followed by treatment with O3, to give two products: formic acid and compound E, whose molecular formula is C4H8O Compound D reacts with O3 followed by treatment with H2O2 to give compound F, whose molecular formula is C3H6O and compound G, whose molecular formula is C2H4O2 What are the structures of compounds A through G?