Помогите решить CH3-CH-OH-CH3+Br2->

CH3-CH2-CH(CH3)-СН3+Br2(СВЕТ)= CH3-CH(Br)-CH(CH3)-CH3 +HBr

CH3-CH(Br)-CH(CH3)-CH3 +KOH(спирт)=CH3-CH=C(CH3)-CH3 +KBr+H2O