помогите пожалуйста, не очень сложно, но я запутался что то...хотя бы 91 и 92

1)2CH4=C2H2+3H2

C2H2+HOH=CH3-COH

CH3-COH+2[Ag(NH3)2]OH=CH3-COOH+4 NH3+2 Ag+H2O

CH3-COOH+NaOH=CH3-COONa+H2O

CH3-COONa=H2+2NaOH+C2H6+2CO2

2)CH3-CH2-COH+2[Ag(NH3)2]OH=CH3-CH2-COOH+4NH3+2Ag+H2O

CH3-CH2-COOH+Cl2=CH3-CHCl-COOH+HCl

CH3-CHCl-COOH+NaOH=CH2=CH-COOH+NaCl+H2O

CH2=CH-COOH+CH3OH=CH2-CH=CO-O-CH3+H2O

nCH2-CH=CO-O-CH3= (-CH-CO-)n

                                               |       |

                                        CH2      O-CH3