Sec. 15. In determining whether an award of joint legal custody under section 13 of this chapter would be in the best interest of the child, the court shall consider it a matter of primary, but not determinative, importance that the persons awarded joint custody have agreed to an award of joint legal custody. The court shall also consider:
(1) the fitness and suitability of each of the persons awarded joint custody;
(2) whether the persons awarded joint custody are willing and able to communicate and cooperate in advancing the child's welfare;
(3) the wishes of the child, with more consideration given to the child's wishes if the child is at least fourteen (14) years of age;
(4) whether the child has established a close and beneficial relationship with both of the persons awarded joint custody;
(5) whether the persons awarded joint custody:
(A) live in close proximity to each other; and
(B) plan to continue to do so; and
(6) the nature of the physical and emotional environment in the home of each of the persons awarded joint custody.