Can someone help me with all 3 questions please. Thank you very much

312 Chapter 6 Arrays and Array Lists P6.28 Write a method public static ArrayList a, ArrayList b) that merges two sorted array lists, producing a new sorted array list. Keep an inda into each array list, indicating how much of it has been processed already. Each tin append the smallest unprocessed element from either array list, then advancethe index. For example, if a is 1 4 9 16 and b is 4 7 9 9 11 then mergeSorted returns the array list 14 4 7 9 99 11 16