Please answer all parts

Part 1:

Part 2:

Part 3:

Part 4:

Here is Java code for a method "mapElements" private T,S> List mapElements(List list, Function mapFct) \{ List newList = new ArrayList (); for (T next: list) \{ newList.add(mapFct.apply(next)); 3 return newList; \} What should BBBBB be? Here is Java code for a method "functionPlay" I Selects a subset of passed collection per selectFct* / public static List functionPlay ( List elements, Function f(t) \{ List list = new ArrayList (); for (T nextElem: elements) \{ if (selectFct.apply(nextElem)) list.add(nextElem); 3 return newElements; \} What should XXXXX be? Here is Java code for a method "functionPlay" /**Selects a subset of passed collection per selectFct*/ public static List functionPlay ( List elements, Function fct) \{ List list = new ArrayList (); for (T nextElem: elements) \{ if (selectFct.apply(nextElem)) list.add(nextElem); 3 return newElements; 3 What should YYYYY be? Here is some Java code: //Declaration Function fct; //Initialization fct= (aVariable) > aVariable >1000; What should YYYYY be