Using M (x,y) and concavity classify the critical point as a maximum , a minimum or a saddle pointA. The profit function has a saddle pointB. The profit function has a local minimumC. The profit function has a local maximum

The profit from selling x toy zebras and y ducklings is given by the following function. Find all points where the given function has any local extrema. Give the values of any local extrema. f(x,y) = - 2xy - 4x - 3y +34x+5By +6 .. . .. Find the partial derivative fx as a function of x and y. fx = 0 Find the partial derivative fy as a function of x and y. fy = 0 Solve fx = 0, fy = 0 to find the critical point (x,y), and compute the function value at this point. When selling x=toy zebra(s) and y=] duckling(s), the profit is $ Find the second-order partial derivative f,x- Find the second-order partial derivative fyy. wy = 0 Find the second-order partial derivative fxy- fxy = 0 Find the value of M(x,y) = fix " fyy - (fxy?) at the critical point: M(x,y)= Using M(x,y) and concavity, classify the critical point as a maximum, a minimum, or a saddle point