Evan looks out of his apartment window and sees his two friends, Devin and Kevin, standing down on the ground. All three are in line with one another with Devin and Kevin standing on opposite sides of the street outside Evan’s apartment. Evan is exactly 40 feet above street level. In order to see Devin, who is closer to him, Evan has to look down at an angle of depression of 68 degrees. In order to see Kevin across the street, Evan only has to look down at an angle of depression of 24 degrees. How far apart are Kevin and Devin?