9. Compound A, C5H11Br, when heated with alcoholic NaOH, gave compound B, C5H10. Compound B decolorized bromine (in CCl4) to give C. B also gave compound D when treated with dilute, aq, sulfuric acid. When D was heated in the presence of concentrated H2SO4, compound E, C5H10, an isomer of B, was formed. E, on treatment with hot, acidic KMnO4 gave CH3CO2H and CH3COCH3 as the only products. Can you give me the structural formulas for compounds A-E?