Identify the correct choice of reagents, among $\mathrm{P}, \mathrm{Q}$ and R , for the transformation of norbornene into the epoxides I and II $\mathrm{P}=\mathrm{H}_{2} \mathrm{O}_{2}-\mathrm{AcOH} \quad \mathrm{Q}=\mathrm{H}_{2} \mathrm{O}_{2}-\mathrm{NaOH} \quad \mathrm{R}=\mathrm{HOBr}$ followed by aq. NaOH.I II