Identify reagents that can be used to achieve the following transformation

( i know you wont believe it but this all actually 1 question ...its crazy what they give student these day... )

Br ? HBr EtOH H2O NaOEt ? CH3OTs NaNH2, followed by CH3I CH31 CH3OH ?, CN NaNHz excess NH3 TsCl and pyridine, followed by NaCN NaCN ? Br NaBr NaOet, followed by NaBr Br2.hv Her ? OH OH RCOZH, followed by H30+ OsO4, NMO excess NaOH excess H30+ ? OH H30+ RCO3H H202 NaOH ? CO2 OH OsO4, NMO NaOH, followed by H2O H30* followed by H20 ? Br excess NaNH, followed by H2O HC=CNa Excess NaNH: HC=CH ? xor Br NaBr Her HBr, ROOR Br2