(3e^(x) sin(y)−9y)dx+(−9x+3e^(x) cos(y))dy=0 a) Considering that the equation has the form M (x, y) dx + N (x, y) dy = 0, write the desired functions: b) Show that the equation is "complete" by calculating the following partial derivatives. Otherwise, you can finish the question at this step by typing "non-exact" in the box below. c) If the equation is complete, taking into account the conditions that the function (x, y) you need to find, fill in the following boxes: d) Find the solution family of the differential equation by integrating the above equations:

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