Business Intelligence Symposium. Each symposium features three speakers on the real$-$world use of analytics. Each corporate member of the center $($there are currently $10)$ receives five free seats to each symposium. Nonmembers wishing to attend must pay $$75$ per person. Each attendee receives

breakfast, lunch, and free parking. The following are the costs incurred for putting on this event:

a$.$

Build a spreadsheet model that calculates a profit or loss based on the number of nonmember

registrants.

b$.$

Use Goal Seek to find the number of nonmember registrants that will make the event break even.