a) State the position of A, B, C, D in coordinate form (Lat, Long). Step 1: Identify the latitude and longitude for each point from the diagram. • Point A is at the intersection of $40^\circ N$ latitude and $30^\circ W$ longitude. • Point B is at the intersection of $40^\circ N$ latitude and $20^\circ E$ longitude. • Point C is at the intersection of $40^\circ S$ latitude and $20^\circ E$ longitude. • Point D is at the intersection of $40^\circ S$ latitude and $30^\circ W$ longitude. The positions are: A: $\boxed{(40^\circ N