7. [2/4 Points] DETAILS PREVIOUS ANSWERS LARCALC12 13.8.038. MY NOTES Consider the following. f(X. y) = X2/3 + y2/3 (a) Find the critical point. W > (b) Test for relative extrema. O The critical point is an absolute maximum. (9 The critical point is an absolute minimum. 0 The critical point is a saddle point. x// (c) List the critical points for which the Second Partials Test fails. W (d) Use a computer algebra system to graph the function