Помогите!

C2H6 - C2H4 - C2H4Br2 - C2H4 - CH3 - CH2CL - CH2=CH2

CH3-CH3 - > CH2=CH2 + H2 (t, kat)

CH2=CH2 + Br2 - > CH2 (Br) - CH2 (Br)

CH2 (Br) - CH2 (Br) - > CH=-CH + 2HBr

CH=-CH+H2 - > CH2=CH2 (t, kat)

CH2=CH2 + HCl - > CH3-CH2Cl

CH3-CH2Cl + KOH-> CH2=CH2 + KCl + H2O