What product is obtained from the reaction of excess benzene

What product is obtained from the reaction of excess benzene with each of the following reagents?

a. isobutylchloride+AlCl3,isobutylchloride+AlCl3,
b. 1−chloro−2,2−dimethylpropane+AlCl3,1−chloro−2,2−dimethylpropane+AlCl3,
c. dichloromethane+AlCl3