1) what isthe mechanism of theses reactions?

uway. 2CH2=CHPh Ph 10 10 - CH, CHPh Сн,сHPh +
CN **3/2 2(CH3)2C CN (CH3)2C=C=N-C(CH3)2
CN CN ÇN CN (CH3)2C-C(CH3)2 CN 6 2(CH3)2C. CN (CH3)2C=C=N-C(CH3)2 LCH 7