First year students studying the online Business Information Studies program can choose which courses to study from a selection of options. Last year, 25 chose to study the Financial Accounting course, 27 chose International Business, and 12 chose Marketing. There were 20 students who took both Financial Accounting and International Business, 5 who opted for Financial Accounting and Marketing, and 3 who studied Marketing and International Business. No students took all three options.

Draw a Venn Diagram to illustrate this operator.

How many students studied only the Marketing course?