D Question 5 Find the sum of the infinite geometric series, if it exists. -10 - 5 - - - - ... O _ 35 2 O does not exist O - 20 O 10Question 6 Find the indicated sum. Find the sum of the first 20 terms of the arithmetic sequence: -15, -5, 5, 15, ... 1600 185 O 1608 O 1700D Question 7 4 pts Identify the conic section that the polar equation represents. Describe the location of a directrix from the focus located at the pole. 7 r - 9- 3 sine O ellipse; The directrix is