(Solved): Please answer all parts Part 1: Part 2: Part 3: Part 4: Here is Java code for a method ...

Please answer all parts

Part 1:

Part 2:

Part 3:

Part 4:

Here is Java code for a method "mapElements" private $$?\mathrm{T},\mathrm{S}>$$ List $$<\mathrm{S}>$$ mapElements(List $$<\mathrm{T}>$$ list, Function $$<$$ AAAAA, BBBBB $$>$$ mapFct) \{ List $$<\mathrm{S}>$$ 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 $$<T>$$ List $$<T>$$ functionPlay $$($$ List $$<T>$$ elements, Function $$<XXXXX$$, YYYYY>f(t) \{ List $$<T>$$ 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 $$<T>$$ List $$<T>$$ functionPlay $$($$ List $$<T>$$ elements, Function $$<XXXXX$$, YYYYY> fct) \{ List $$<\mathrm{T}>$$ 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 $$<XXXXX,YYYYY>fct;$$ //Initialization $$\mathrm{fct}=$$ (aVariable) $$?>$$ aVariable $$>1000$$; What should YYYYY be?