(Mixed queries on the conference database) From the textbook website, download the conference database. Write SQL queries for the following: A Show a “master schedule” for the conference. For each presentation at the conference, this query should list the date, session start time, session title, room, speaker first name, and speaker last name. It should be sorted by date, then by session start time, then by session title, then by speaker last name. B Show the ID, name, date, and start time of each session, along with the number of speakers scheduled for the session. Sort the results from the largest number of speakers to the smallest. C Show the ID, name, date, and start time of each session, along with the number of speakers scheduled, for each session with at least two speakers. Sort the results from the largest number of speakers to the smallest. D Show a schedule for room 101. For each presentation at the conference in room 101, show the session start date, session start time, session title, speaker first name, and speaker last name. Sort the results by order of occurrence (earliest first) and then by speaker last name.