Implement methods with the following headers:

public int[] filledArray(int from, int to)
and

public List<Integer> filledList(int from, int to)`
These methods should return populated lists with integer values in the range from the lower bound from (inclusive) until the upper bound to (exclusive).

e.g. filledArray(0, 5); should return the following array [0,1,2,3,4]

Special cases:

If from == to, an empty list should be returned.

If to < from, an IllegalArgumentException should be thrown.