Erika is writing a coordinate proof to show that the diagonals of a rectangle are congruent. She begins by assigning coordinates to the vertices of a rectangle as shown.Which sentence describes what Erika should do to prove that the diagonals of the rectangle are congruent? Show that the slope of KM¯¯¯¯¯¯¯ is ba and the slope of JL¯¯¯¯¯ is −ba. Show that the diagonals intersect at (a2, b2) . Show that JL=KM=a2+b2−−−−−−√. Show that JL¯¯¯¯¯ and KM¯¯¯¯¯¯¯ have the same midpoint.