Antonio has $7.00 to spend on lunch consisting of hamburgers ($2.50 each) and french fries ($2.00 per order). Antonio's satisfaction from eating x1 hamburgers and x2 orders of french fries is measured by a function U(x1, X2) = x1X2. How much of each type of food F should he purchase to maximize his satisfaction? (Assume that fractional amounts of each food can be purchased.) (Use symbolic notation and fractions where needed. Give your answer as the coordinates of a point in the form (*,*).) F = (1.4,3.5 )