Aldehydes, Ketones and Carboxylic Acids

Paragraph for next 2 Questions
An organic compoundPwith molecular formulaC9H18O2decolorizes bromine water and also shows positive iodoform test. P on o7onolysis followed by treatment withH2O2givesQandR. While compound Qshows positive iodoform test, compound R does not give positive iodoform test. Q and R on oxidation with pyridinium chlorochromate (PCC) followed by heating giveSandT, respectively. Both S and T show positive iodoform test.
Complete copolymerization of 500 moles of Q and 500 moles of R gives one mole of a single acyclic copolymerU.
[Given, atomic mass:H=1,C=12,O=16]