19. Please solve

For the function defined as follows, find all values of x and y such that both f, (x,y) = 0 and f, (x,y) = 0. f(x,y) = 2x~+7y" +5xy +36x -2 Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice. A. There is only one solution where f. (x,y) = 0 and f (x,y) = 0, when x = and y = (Type integers or simplified fractions.) B. There are three solutions where f. (x.y) = 0 and f. (x,y) - 0, in order from increasing x values, when x = | and y= and x= and y = and XT and y = (Type integers or simplified fractions.) . There are two solutions where f.(x,y) =0 and f.(x.y) = 0, in order from increasing x values, when x =] and y = and x = and y= (Type integers or simplified fractions.) D. There are no solutions where f, (x,y) = 0 and f, (x.y) =0