Java homework help please

Part 2: FlatApply End result of Part 2 pass all tests in these files o FlatApplyTest java run the following Queries o TextQuery2.java Here is a motivating query. Let's suppose we have a list of numbers [10,50,1,400]. This list will be our input data. The query is "repeat each element 2 times" This query will produce eight output elements: 10,10,50,50,1,1,400,400. At first glance, it seems like we may be able to accomplish this with Apply and a well chosen f. However, Apply only allows us to output exactly 1 element for each input element. We could certainly define an f whose return type is List