I need help with Q3 of this document: https://www.coursehero.com/u/file/68341239/Mkting-Mgt-MSM-Assig1-091020v1-5pdf/#question

The full text reads:

Johns Hopkins Carey Business School is organizing its inaugural conference in health care marketing. The main purpose of this conference is to share cutting-edge research topics and methodologies among academics. Another purpose is to show health care providers the latest research in marketing so that they can apply it to improve adoption of new treatments and patient experiences. The conference provides a platform for professional networking and exchange of ideas, learning and knowledge.

Conference attendees will include both academicians and industry practitioners. If someone would like to present his/her research in the conference, he/she needs to submit a research paper to the conference by a deadline, and the conference committee will select a subset of the submissions for presentation. In order to attend the conference, attendees must register. The registration fees are:

i.Presenters $0

ii.Academic participants $300

iii.Industry participants $600

Note that Industry participants are the people who work for companies.

Explain your answers in details based on network externality and two-sided market theory.

(a)Why does the conference charge the industry participants more than academic participants? (5 points)

(b)Why does the conference decide NOT to charge presenters anything? (5 points)