Combine two lists by summing corresponding elements

def combine_lists(list1, list2):
    """
    Combines two lists by summing corresponding elements.

    Args:
        list1 (list): The first input list of integers.
        list2 (list): The second input list of integers.

    Returns:
        list: A new list with the sum of corresponding elements.
    """
    # TODO: Implement the combine_lists function
    pass