Four distinct points are arranged in a plane so that the segments connecting them has lengths a,a,a,a,2a, and b. What is the ratio of b to a?<spanclass=′latex−bold′>(A)</span>3<spanclass=′latex−bold′>(B)</span>2<spanclass=′latex−bold′>(C)</span>5<spanclass=′latex−bold′>(D)</span>3<spanclass=′latex−bold′>(E)</span>π