The profit from selling x plush squirrels and y rhinos 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) = - 4xy - 7x2 - 4y2 + 106x+ 44y +9 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 fy = 0, fy =0 to find the critical point (x,y), and compute the function value at this point. When selling x=plush squirrel(s) and y=rhino(s), the profit is $ Find the second-order partial derivative fxx . fx = 0 Find the second-order partial derivative fyy- fry = 0 Find the second-order partial derivative fxy- fxy = Find the value of M(x,y) = fxx - fyy - (fxy