the second for statement in my solution is supposed to add the remaining elements of a2 onto a1 but it's not working. help me fix.

BJP5 Exercise 10.17: interleave Language/Type:Author:MartyStepp(on2019/09/19) Write a method called inter leave that accepts two ArrayLists of integers a1 and a2 as parameters and inserts the elements of a2 into a1 at alternating indexes. If the lists are of unequal length, the remaining elements of the longer list are left at the end of a1. For example, if a1 stores [10,20,30] and a2 stores [4,5,6,7,8], the call of inter leave (a1, a2); should change a1 to store [10,4,20,5,30,6,7,8]. If a1 had stored [10,20,30,40,50] and a2 had stored [6,7,8], the call of inter leave (a1,a2); would change a1 to store [10,6,20,7,30,8,40,50]. Type your solution here: You passed 6 of 8 tests. Try again