8. All the 100 Final year Students of Mathematics Department, University of Calabar were asked their subject combinations. 45 of the students offered Mathematics. 50 offered Physics while 57 offered Chemistry. 28 Students offered Mathematics and Chemistry. 25 offered Physics and Chemistry while 11 offered the three subject combinations. How many student (a) offered Mathematics but offered neither Physics nor Chemistry (b) offered Physics but offered neither Mathematics nor Chemistry (c) offered Chemistry but offered neither Mathematics nor Physics (d) did not offer any of the three subject combination.​