Solve this

1) A survey of 280 college students produced the following information: 66 had taken a database course, 95 had taken a discrete mathematics course, 61 had taken a computer networks course, 32 had taken both a database and computer networks, 24 had taken both a database and discrete mathematics, 20 had taken both a discrete mathematics and computer networks, 16 had taken all three types of courses. a) How many students were surveyed who had taken none of the three types of courses? 21.5me b) How many students were surveyed who had taken only computer networks course? 14.5 marks! (Writ the rules then nd the solution)