If the electronic configuration of elements A and B are respectively, then the formula of the compound formed by the combination of these elements will be:
A village woman walks 2.5 km South starting from her home in search of water. She then turns West and walks 1.5 km, then she turns South and walks 0.5km, then she turns to her left and walks 1.5 km. Where is she now with respect to her home?