Find the first term a 1 , the common ratio r, and the nth term a Subscript n for the following geometric sequence. pi Superscript 10 , pi Superscript 15 , pi Superscript 20 , pi Superscript 25 , . . . Question content area bottom Part 1 The first term of the sequence is a 1 equalsenter your response here . (Type an exact answer, using pi as needed.) Part 2 The common ratio of the sequence is requals enter your response here . (Type an exact answer, using pi as needed.) Part 3 The nth term of the sequence is a Subscript n equalsenter your response here . (Type an exact answer, using pi as needed.)