SAT Probability and conditional probability Question

A real estate company offers a series of three webinars. 2,000 people attended the first webinar $65\%$ of the people who attended the first webinar attended the second webinar, and $44\%$ of the people who attended both the first and second webinar attended the third webinar. Of those who attended the first but did not attend the second webinar, $31\%$ attended the third webinar. How many people attended both the first and third webinars but did not attend the second webinar?