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Question 13 (10 points) Find the length of the spiral r = e from 0 = 0 to 0 = 2TT. O V2 O V2(e27 - 1) O e 4n O e 27 - 1Question 15 (10 points) Find the polar equation of a conic with eccentricity , directrix x=1 and focus (0,0). O 3 r= 1 + cos 0 O r = 1 O 1 r = 3 + cos 0 O r = 1 + cos 0Question 16 (10 points) Find the foci of the ellipse (x-3)2 + ( y + 2 ) 2 4 3 = 1 O (3, 0), (2, 0) O (- 2, 2), (- 4, 2) O (3, 2) O (2, -2), (4, -2)