Use a graph or level curves or both to find the local maximum and minimum values and saddle points of the function. Then use calculus to find these values precisely. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.) f(x, y) = sin x + sin y + sin(x+y)+1, 0≤x≤ 2, 0 sys 2m local maximum value(s) local minimum value(s) saddle point(s)

Sketch the contour map of the function. You may use the graphing calculator. f (x,y) =x2+ 4y2

Please ignore the answer I wrote down and do the question on your own. The last blank you can either wrote "differentiable" or "not differentiable", and the first three blanks you have to write a number. Thank you.