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The word "density" in the title refers to a method for plotting 3-D information on a two dimensional screen. Here it has nothing to do with the probability density in quantum mechanics.
Independent of n, does the number of angular lobes equal the number you found in Exercise 2 of the Polar part?
Independent of q, do the zero points for the amplitude in the radial direction match those of Exercise 2 of the Radial part?