Vanessa draws one side of equilateral δabc on the coordinate plane at points a(–2, 1) and b(4,1). what are the possible coordinates of vertex c? select all that apply. a. (–4.2, 6.2) b. (1, –4.2) c. (6.2, 4.2) d. (1, 4.2) e. (1, 6.2)