Question

Public static void prefixmerge(customer[] list1, customer[] list2, customer[] result {

Answer 1

I can't get what do you need, but I guess it's a part of java code. I can explain what it means. It's used to unite two rising sorted arrays which are list1 and list2. The result is stored in result array. I suggest you to clearly explain your task as it's difficult to give you correct answer.