Sarita and Her Friend Jonah Both Own Flower Shops

Short Answer

Sarita and her friend Jonah both own flower shops. Their shops are in adjoining towns located approximately 10 miles apart. Sarita agrees that she will not sell flowers for delivery in Jonah's town in return for Jonah agreeing that he will not sell flowers for delivery in Sarita's town. Have Sarita and Jonah committed any antitrust violation? If so, what is the violation and under what standard would it be reviewed?