Answer:1. 4y2. 3z3. y4. 4n5. 5Step-by-step explanation:hahanapin ang GCF and yun yung base, like 2 and 4, GCF is 2. then pipiliin yung pinakamababang power, like 2y and 2y², mas mababa yung y sa y², thus, 2y yung answer. pag walang GCF, 1 yung answer. like 3y and 2y = y lang siya or 1ypag magkaibang variable, isusulat lang yung parehong variable, like 2y and 2s = 2 lang siya